/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_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:42:38,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:42:38,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:42:38,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:42:38,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:42:38,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:42:38,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:42:38,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:42:38,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:42:38,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:42:38,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:42:38,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:42:38,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:42:38,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:42:38,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:42:38,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:42:38,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:42:38,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:42:38,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:42:38,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:42:38,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:42:38,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:42:38,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:42:38,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:42:38,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:42:38,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:42:38,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:42:38,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:42:38,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:42:38,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:42:38,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:42:38,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:42:38,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:42:38,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:42:38,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:42:38,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:42:38,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:42:38,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:42:38,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:42:38,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:42:38,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:42:38,760 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 23:42:38,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:42:38,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:42:38,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:42:38,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:42:38,784 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:42:38,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:42:38,784 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:42:38,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:42:38,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:42:38,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:42:38,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:42:38,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:42:38,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:42:38,786 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:42:38,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:42:38,786 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:42:38,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:42:38,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:42:38,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:42:38,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:42:38,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:42:38,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:38,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:42:38,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:42:38,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:42:38,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:42:38,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:42:38,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:42:38,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:42:38,789 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 23:42:39,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:42:39,114 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:42:39,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:42:39,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:42:39,123 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:42:39,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-13 23:42:39,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30bc1f0e5/2cad1525741f43878ca611a5eee5a916/FLAGabcae843f [2020-10-13 23:42:39,671 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:42:39,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-13 23:42:39,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30bc1f0e5/2cad1525741f43878ca611a5eee5a916/FLAGabcae843f [2020-10-13 23:42:40,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30bc1f0e5/2cad1525741f43878ca611a5eee5a916 [2020-10-13 23:42:40,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:42:40,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:42:40,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:40,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:42:40,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:42:40,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54957e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40, skipping insertion in model container [2020-10-13 23:42:40,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:42:40,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:42:40,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:40,288 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:42:40,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:40,332 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:42:40,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40 WrapperNode [2020-10-13 23:42:40,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:40,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:42:40,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:42:40,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:42:40,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (1/1) ... [2020-10-13 23:42:40,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:42:40,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:42:40,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:42:40,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:42:40,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (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 23:42:40,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:42:40,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:42:40,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:42:40,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:42:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:42:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:42:40,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:42:40,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:42:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:42:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:42:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:42:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:42:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:42:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:42:40,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:42:40,806 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:42:40,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:40 BoogieIcfgContainer [2020-10-13 23:42:40,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:42:40,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:42:40,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:42:40,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:42:40,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:42:40" (1/3) ... [2020-10-13 23:42:40,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa1cfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:40, skipping insertion in model container [2020-10-13 23:42:40,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:40" (2/3) ... [2020-10-13 23:42:40,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa1cfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:40, skipping insertion in model container [2020-10-13 23:42:40,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:40" (3/3) ... [2020-10-13 23:42:40,819 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2020-10-13 23:42:40,829 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:42:40,837 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:42:40,852 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:42:40,875 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:42:40,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:42:40,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:42:40,875 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:42:40,875 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:42:40,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:42:40,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:42:40,876 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:42:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 23:42:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:40,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:40,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:40,906 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -766370701, now seen corresponding path program 1 times [2020-10-13 23:42:40,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:40,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743540307] [2020-10-13 23:42:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:41,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 23:42:41,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:41,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:42:41,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:42:41,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:41,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:41,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:41,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:42:41,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:41,374 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 23:42:41,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743540307] [2020-10-13 23:42:41,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:41,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:42:41,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95225919] [2020-10-13 23:42:41,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:42:41,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:41,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:42:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:41,405 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 23:42:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:41,557 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2020-10-13 23:42:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:42:41,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:42:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:41,569 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:42:41,569 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:42:41,573 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 23:42:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:42:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 23:42:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:42:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-10-13 23:42:41,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2020-10-13 23:42:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:41,620 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-10-13 23:42:41,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:42:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-10-13 23:42:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:41,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:41,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:41,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:42:41,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash 288109956, now seen corresponding path program 1 times [2020-10-13 23:42:41,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:41,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352474840] [2020-10-13 23:42:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:41,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:41,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:41,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-13 23:42:41,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:42:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:42:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:42,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:42,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:42,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:42,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:42,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:42,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:42,047 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 23:42:42,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352474840] [2020-10-13 23:42:42,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:42,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:42,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201651996] [2020-10-13 23:42:42,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:42,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:42,052 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 4 states. [2020-10-13 23:42:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:42,217 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2020-10-13 23:42:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:42,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:42:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:42,220 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:42:42,220 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:42:42,222 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 23:42:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:42:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-13 23:42:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:42:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-13 23:42:42,241 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-10-13 23:42:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:42,243 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-13 23:42:42,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-13 23:42:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:42:42,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:42,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:42,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:42:42,248 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1452110141, now seen corresponding path program 1 times [2020-10-13 23:42:42,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:42,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302851482] [2020-10-13 23:42:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:46,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:42:46,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:46,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4113 [2020-10-13 23:42:46,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:46,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:42:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:42:46,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:46,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:46,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:46,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:46,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:46,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:46,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:46,463 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 23:42:46,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302851482] [2020-10-13 23:42:46,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:46,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:46,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255552466] [2020-10-13 23:42:46,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:46,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:46,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:46,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:46,468 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2020-10-13 23:42:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:46,605 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-10-13 23:42:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:46,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 23:42:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:46,607 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:42:46,607 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:42:46,608 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 23:42:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:42:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-13 23:42:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:42:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-13 23:42:46,618 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 27 [2020-10-13 23:42:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:46,618 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-13 23:42:46,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-13 23:42:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:42:46,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:46,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:46,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:42:46,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -30119072, now seen corresponding path program 2 times [2020-10-13 23:42:46,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:46,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174417676] [2020-10-13 23:42:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:46,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:51,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:42:51,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:42:51,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:42:51,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:51,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:42:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:42:51,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:51,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:51,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:51,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:51,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:42:51,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174417676] [2020-10-13 23:42:51,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:51,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714332418] [2020-10-13 23:42:51,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:51,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:51,694 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 6 states. [2020-10-13 23:42:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:51,838 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2020-10-13 23:42:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:51,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-13 23:42:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:51,840 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:42:51,840 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:42:51,841 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 23:42:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:42:51,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2020-10-13 23:42:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:42:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-10-13 23:42:51,851 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 39 [2020-10-13 23:42:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:51,852 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-10-13 23:42:51,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:51,852 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-10-13 23:42:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:42:51,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:51,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:51,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:42:51,854 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1980438233, now seen corresponding path program 3 times [2020-10-13 23:42:51,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:51,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089083601] [2020-10-13 23:42:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:56,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:42:56,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:42:56,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:42:56,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:56,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:42:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:42:56,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:56,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:56,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:56,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:56,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:56,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:56,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:56,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:56,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:56,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:56,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:56,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 23:42:56,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089083601] [2020-10-13 23:42:56,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:56,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:56,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607433721] [2020-10-13 23:42:56,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:56,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:56,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:56,963 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 7 states. [2020-10-13 23:42:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:57,127 INFO L93 Difference]: Finished difference Result 112 states and 158 transitions. [2020-10-13 23:42:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:57,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-13 23:42:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:57,129 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:42:57,130 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:42:57,130 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 23:42:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:42:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-10-13 23:42:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:42:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-10-13 23:42:57,140 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 51 [2020-10-13 23:42:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:57,140 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-10-13 23:42:57,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-10-13 23:42:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:42:57,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:57,143 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:57,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:42:57,143 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash 31055676, now seen corresponding path program 4 times [2020-10-13 23:42:57,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:57,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524898965] [2020-10-13 23:42:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:57,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:01,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:02,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:43:02,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:43:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:43:02,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:02,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:02,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:43:02,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:43:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:43:02,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:02,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:02,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:02,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:02,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:43:02,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:02,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:02,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:02,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:02,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:02,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 23:43:02,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524898965] [2020-10-13 23:43:02,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:43:02,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:43:02,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966255967] [2020-10-13 23:43:02,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:43:02,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:43:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:43:02,284 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 6 states. [2020-10-13 23:43:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:02,398 INFO L93 Difference]: Finished difference Result 117 states and 168 transitions. [2020-10-13 23:43:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:43:02,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-13 23:43:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:02,400 INFO L225 Difference]: With dead ends: 117 [2020-10-13 23:43:02,401 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:43:02,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:43:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:43:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-13 23:43:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:43:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-10-13 23:43:02,418 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 63 [2020-10-13 23:43:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:02,419 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-10-13 23:43:02,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:43:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-10-13 23:43:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:43:02,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:02,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:02,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:43:02,423 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash 224022332, now seen corresponding path program 1 times [2020-10-13 23:43:02,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:02,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893558411] [2020-10-13 23:43:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:02,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:04,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:07,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:43:07,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:43:07,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:07,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:07,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:43:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:43:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:43:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:07,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:07,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:07,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:07,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:43:07,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:07,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:07,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-13 23:43:07,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893558411] [2020-10-13 23:43:07,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:07,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:43:07,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470308995] [2020-10-13 23:43:07,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:43:07,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:43:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:07,539 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 8 states. [2020-10-13 23:43:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:07,720 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2020-10-13 23:43:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:43:07,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-13 23:43:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:07,722 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:43:07,722 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:43:07,725 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 23:43:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:43:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2020-10-13 23:43:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:43:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2020-10-13 23:43:07,743 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 63 [2020-10-13 23:43:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:07,744 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2020-10-13 23:43:07,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:43:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2020-10-13 23:43:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:43:07,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:07,746 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:07,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:43:07,747 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:07,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1161398965, now seen corresponding path program 2 times [2020-10-13 23:43:07,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:07,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435757517] [2020-10-13 23:43:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:07,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:12,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:12,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:43:12,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:43:12,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:43:12,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:12,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:43:12,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:43:12,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:43:12,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:12,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:12,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:12,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:12,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:12,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:12,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:12,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:12,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:12,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:12,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:43:12,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435757517] [2020-10-13 23:43:12,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:12,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:43:12,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276575592] [2020-10-13 23:43:12,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:43:12,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:12,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:43:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:12,865 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand 9 states. [2020-10-13 23:43:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:13,064 INFO L93 Difference]: Finished difference Result 204 states and 282 transitions. [2020-10-13 23:43:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:43:13,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-13 23:43:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:13,066 INFO L225 Difference]: With dead ends: 204 [2020-10-13 23:43:13,066 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:43:13,067 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 23:43:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:43:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2020-10-13 23:43:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:43:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2020-10-13 23:43:13,076 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 75 [2020-10-13 23:43:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:13,077 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2020-10-13 23:43:13,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:43:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2020-10-13 23:43:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:43:13,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:13,079 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:13,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:43:13,079 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:13,079 INFO L82 PathProgramCache]: Analyzing trace with hash -383174376, now seen corresponding path program 3 times [2020-10-13 23:43:13,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:13,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118690773] [2020-10-13 23:43:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:13,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:18,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:43:18,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:43:18,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:43:18,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:18,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:43:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:43:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:43:18,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:18,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:18,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:18,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:18,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:18,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:18,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:43:18,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118690773] [2020-10-13 23:43:18,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:18,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:43:18,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144200043] [2020-10-13 23:43:18,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:18,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:18,191 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand 10 states. [2020-10-13 23:43:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:18,433 INFO L93 Difference]: Finished difference Result 234 states and 324 transitions. [2020-10-13 23:43:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:43:18,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-10-13 23:43:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:18,435 INFO L225 Difference]: With dead ends: 234 [2020-10-13 23:43:18,435 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:43:18,436 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 23:43:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:43:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2020-10-13 23:43:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:43:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 172 transitions. [2020-10-13 23:43:18,457 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 172 transitions. Word has length 87 [2020-10-13 23:43:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:18,457 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 172 transitions. [2020-10-13 23:43:18,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 172 transitions. [2020-10-13 23:43:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:43:18,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:18,461 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:18,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:43:18,461 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1028052049, now seen corresponding path program 4 times [2020-10-13 23:43:18,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:18,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446228220] [2020-10-13 23:43:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:23,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:43:23,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:43:23,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:43:23,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:23,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:23,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:43:23,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:43:23,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:43:23,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:23,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:23,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:23,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:23,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:23,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:23,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:23,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-13 23:43:23,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446228220] [2020-10-13 23:43:23,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:23,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:43:23,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645573092] [2020-10-13 23:43:23,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:43:23,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:23,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:43:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:23,588 INFO L87 Difference]: Start difference. First operand 128 states and 172 transitions. Second operand 11 states. [2020-10-13 23:43:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:23,852 INFO L93 Difference]: Finished difference Result 264 states and 366 transitions. [2020-10-13 23:43:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:23,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-13 23:43:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:23,854 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:43:23,854 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:43:23,855 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 23:43:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:43:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2020-10-13 23:43:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 23:43:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 194 transitions. [2020-10-13 23:43:23,874 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 194 transitions. Word has length 99 [2020-10-13 23:43:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:23,876 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 194 transitions. [2020-10-13 23:43:23,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:43:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 194 transitions. [2020-10-13 23:43:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:43:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:23,881 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:23,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:43:23,882 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:23,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1513185524, now seen corresponding path program 5 times [2020-10-13 23:43:23,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:23,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616307440] [2020-10-13 23:43:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:23,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:28,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:28,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:43:28,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:28,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:43:28,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:29,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:29,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:29,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:29,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:29,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 43 proven. 29 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 23:43:29,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616307440] [2020-10-13 23:43:29,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:29,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:43:29,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024695311] [2020-10-13 23:43:29,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:29,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:29,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:29,209 INFO L87 Difference]: Start difference. First operand 144 states and 194 transitions. Second operand 10 states. [2020-10-13 23:43:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:29,403 INFO L93 Difference]: Finished difference Result 342 states and 476 transitions. [2020-10-13 23:43:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:43:29,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2020-10-13 23:43:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:29,407 INFO L225 Difference]: With dead ends: 342 [2020-10-13 23:43:29,407 INFO L226 Difference]: Without dead ends: 254 [2020-10-13 23:43:29,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-13 23:43:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 173. [2020-10-13 23:43:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 23:43:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2020-10-13 23:43:29,418 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 111 [2020-10-13 23:43:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:29,418 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2020-10-13 23:43:29,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2020-10-13 23:43:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:43:29,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:29,420 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:29,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:43:29,420 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash 974117236, now seen corresponding path program 1 times [2020-10-13 23:43:29,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:29,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943720041] [2020-10-13 23:43:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:29,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:34,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:43:34,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:34,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:34,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:34,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:34,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:34,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-13 23:43:34,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943720041] [2020-10-13 23:43:34,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:34,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:34,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269181622] [2020-10-13 23:43:34,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:34,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:34,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:34,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:34,547 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand 12 states. [2020-10-13 23:43:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:34,841 INFO L93 Difference]: Finished difference Result 357 states and 490 transitions. [2020-10-13 23:43:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:34,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-10-13 23:43:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:34,845 INFO L225 Difference]: With dead ends: 357 [2020-10-13 23:43:34,845 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 23:43:34,846 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 23:43:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 23:43:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2020-10-13 23:43:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 23:43:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 257 transitions. [2020-10-13 23:43:34,861 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 257 transitions. Word has length 111 [2020-10-13 23:43:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:34,862 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 257 transitions. [2020-10-13 23:43:34,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 257 transitions. [2020-10-13 23:43:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:43:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:34,868 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:34,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:43:34,869 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1748139155, now seen corresponding path program 2 times [2020-10-13 23:43:34,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:34,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615168558] [2020-10-13 23:43:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:34,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:35,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:35,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:35,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:38,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:38,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:39,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:39,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:43:39,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:43:39,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:39,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:40,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:40,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:40,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:43:40,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:40,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:40,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:40,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:40,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:40,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:43:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 23:43:40,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615168558] [2020-10-13 23:43:40,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:40,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:43:40,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154961630] [2020-10-13 23:43:40,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:43:40,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:43:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:40,020 INFO L87 Difference]: Start difference. First operand 192 states and 257 transitions. Second operand 13 states. [2020-10-13 23:43:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:40,254 INFO L93 Difference]: Finished difference Result 393 states and 540 transitions. [2020-10-13 23:43:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:43:40,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-10-13 23:43:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:40,257 INFO L225 Difference]: With dead ends: 393 [2020-10-13 23:43:40,257 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 23:43:40,258 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 23:43:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 23:43:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 211. [2020-10-13 23:43:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 23:43:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 283 transitions. [2020-10-13 23:43:40,266 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 283 transitions. Word has length 123 [2020-10-13 23:43:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:40,266 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 283 transitions. [2020-10-13 23:43:40,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:43:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 283 transitions. [2020-10-13 23:43:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:43:40,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:40,268 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:40,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:43:40,269 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1021534032, now seen corresponding path program 3 times [2020-10-13 23:43:40,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:40,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23842945] [2020-10-13 23:43:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:45,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:45,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 23:43:45,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:43:45,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:43:45,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:45,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:43:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:43:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:43:45,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:45,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:45,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:45,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:45,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:45,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:45,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:45,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:45,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:45,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:45,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:45,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 23:43:45,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23842945] [2020-10-13 23:43:45,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:45,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:43:45,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605941381] [2020-10-13 23:43:45,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:43:45,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:43:45,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:45,474 INFO L87 Difference]: Start difference. First operand 211 states and 283 transitions. Second operand 14 states. [2020-10-13 23:43:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:45,736 INFO L93 Difference]: Finished difference Result 429 states and 590 transitions. [2020-10-13 23:43:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:43:45,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-10-13 23:43:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:45,738 INFO L225 Difference]: With dead ends: 429 [2020-10-13 23:43:45,738 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 23:43:45,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 23:43:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 230. [2020-10-13 23:43:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 23:43:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 309 transitions. [2020-10-13 23:43:45,752 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 309 transitions. Word has length 135 [2020-10-13 23:43:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:45,752 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 309 transitions. [2020-10-13 23:43:45,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:43:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 309 transitions. [2020-10-13 23:43:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:43:45,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:45,754 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:45,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:43:45,755 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash -178288375, now seen corresponding path program 4 times [2020-10-13 23:43:45,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:45,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741122903] [2020-10-13 23:43:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:45,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:49,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:50,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:50,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:43:50,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:43:50,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:43:50,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:50,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:50,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:43:50,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:50,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 23:43:50,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:50,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:50,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:50,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:50,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:50,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:50,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:50,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:50,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 120 proven. 74 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-10-13 23:43:51,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741122903] [2020-10-13 23:43:51,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:51,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:51,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839646570] [2020-10-13 23:43:51,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:51,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:51,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:51,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:51,014 INFO L87 Difference]: Start difference. First operand 230 states and 309 transitions. Second operand 12 states. [2020-10-13 23:43:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:51,317 INFO L93 Difference]: Finished difference Result 524 states and 724 transitions. [2020-10-13 23:43:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:51,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 147 [2020-10-13 23:43:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:51,320 INFO L225 Difference]: With dead ends: 524 [2020-10-13 23:43:51,320 INFO L226 Difference]: Without dead ends: 414 [2020-10-13 23:43:51,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-13 23:43:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 311. [2020-10-13 23:43:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-13 23:43:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 415 transitions. [2020-10-13 23:43:51,336 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 415 transitions. Word has length 147 [2020-10-13 23:43:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:51,336 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 415 transitions. [2020-10-13 23:43:51,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 415 transitions. [2020-10-13 23:43:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:43:51,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:51,339 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:51,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:43:51,339 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2143215223, now seen corresponding path program 5 times [2020-10-13 23:43:51,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:51,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207318087] [2020-10-13 23:43:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:51,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:51,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:51,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:51,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:56,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:56,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:43:56,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:43:56,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:43:56,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:56,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:56,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:43:56,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:43:56,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:43:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:56,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:56,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:56,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:56,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:56,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:56,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:56,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:56,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-13 23:43:56,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207318087] [2020-10-13 23:43:56,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:56,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:43:56,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717763237] [2020-10-13 23:43:56,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:43:56,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:56,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:43:56,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:56,512 INFO L87 Difference]: Start difference. First operand 311 states and 415 transitions. Second operand 15 states. [2020-10-13 23:43:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:56,861 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-10-13 23:43:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:43:56,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2020-10-13 23:43:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:56,864 INFO L225 Difference]: With dead ends: 637 [2020-10-13 23:43:56,864 INFO L226 Difference]: Without dead ends: 355 [2020-10-13 23:43:56,865 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 23:43:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-13 23:43:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 336. [2020-10-13 23:43:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-13 23:43:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 449 transitions. [2020-10-13 23:43:56,880 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 449 transitions. Word has length 147 [2020-10-13 23:43:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:56,881 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 449 transitions. [2020-10-13 23:43:56,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:43:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 449 transitions. [2020-10-13 23:43:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:43:56,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:56,883 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:56,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:43:56,883 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:56,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1196423852, now seen corresponding path program 6 times [2020-10-13 23:43:56,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:56,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304969918] [2020-10-13 23:43:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:56,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:57,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:01,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:44:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:02,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:02,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:02,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:02,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:02,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:02,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:02,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-10-13 23:44:02,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304969918] [2020-10-13 23:44:02,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:02,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:44:02,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684660806] [2020-10-13 23:44:02,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:44:02,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:02,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:44:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:44:02,070 INFO L87 Difference]: Start difference. First operand 336 states and 449 transitions. Second operand 16 states. [2020-10-13 23:44:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:02,439 INFO L93 Difference]: Finished difference Result 685 states and 934 transitions. [2020-10-13 23:44:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:44:02,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2020-10-13 23:44:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:02,442 INFO L225 Difference]: With dead ends: 685 [2020-10-13 23:44:02,442 INFO L226 Difference]: Without dead ends: 380 [2020-10-13 23:44:02,443 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 23:44:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-13 23:44:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 361. [2020-10-13 23:44:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-13 23:44:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 483 transitions. [2020-10-13 23:44:02,464 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 483 transitions. Word has length 159 [2020-10-13 23:44:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:02,464 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 483 transitions. [2020-10-13 23:44:02,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:44:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 483 transitions. [2020-10-13 23:44:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:44:02,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:02,466 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:02,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:44:02,467 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash -33245915, now seen corresponding path program 7 times [2020-10-13 23:44:02,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:02,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612601423] [2020-10-13 23:44:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:02,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:02,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:05,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:05,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:06,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:07,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:07,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:44:07,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:44:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:44:07,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:07,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:44:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 23:44:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:07,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:07,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:07,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:07,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:07,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:07,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:07,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:07,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:07,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:07,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:07,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:07,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 205 proven. 131 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2020-10-13 23:44:07,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612601423] [2020-10-13 23:44:07,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:07,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:44:07,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539150522] [2020-10-13 23:44:07,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:44:07,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:07,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:44:07,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:44:07,722 INFO L87 Difference]: Start difference. First operand 361 states and 483 transitions. Second operand 14 states. [2020-10-13 23:44:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:08,234 INFO L93 Difference]: Finished difference Result 781 states and 1068 transitions. [2020-10-13 23:44:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:44:08,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 171 [2020-10-13 23:44:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:08,242 INFO L225 Difference]: With dead ends: 781 [2020-10-13 23:44:08,242 INFO L226 Difference]: Without dead ends: 660 [2020-10-13 23:44:08,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2020-10-13 23:44:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 546. [2020-10-13 23:44:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-13 23:44:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 727 transitions. [2020-10-13 23:44:08,291 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 727 transitions. Word has length 171 [2020-10-13 23:44:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:08,293 INFO L479 AbstractCegarLoop]: Abstraction has 546 states and 727 transitions. [2020-10-13 23:44:08,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:44:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 727 transitions. [2020-10-13 23:44:08,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:44:08,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:08,296 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 10, 10, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:08,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:44:08,297 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1195281573, now seen corresponding path program 8 times [2020-10-13 23:44:08,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:08,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271359393] [2020-10-13 23:44:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:08,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:09,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:09,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:13,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:13,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:44:13,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:44:13,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:44:13,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:13,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:44:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:44:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:44:13,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:13,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:13,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:13,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:13,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:13,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:13,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:13,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-13 23:44:13,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271359393] [2020-10-13 23:44:13,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:13,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:44:13,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119056849] [2020-10-13 23:44:13,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:44:13,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:44:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:44:13,516 INFO L87 Difference]: Start difference. First operand 546 states and 727 transitions. Second operand 17 states. [2020-10-13 23:44:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:13,901 INFO L93 Difference]: Finished difference Result 1123 states and 1520 transitions. [2020-10-13 23:44:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:44:13,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2020-10-13 23:44:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:13,904 INFO L225 Difference]: With dead ends: 1123 [2020-10-13 23:44:13,905 INFO L226 Difference]: Without dead ends: 610 [2020-10-13 23:44:13,906 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 23:44:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-13 23:44:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 583. [2020-10-13 23:44:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-13 23:44:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 777 transitions. [2020-10-13 23:44:13,931 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 777 transitions. Word has length 171 [2020-10-13 23:44:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:13,932 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 777 transitions. [2020-10-13 23:44:13,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:44:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 777 transitions. [2020-10-13 23:44:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 23:44:13,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:13,935 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 11, 11, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:13,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:44:13,935 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1015977224, now seen corresponding path program 9 times [2020-10-13 23:44:13,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:13,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688472916] [2020-10-13 23:44:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:17,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:18,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:18,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:18,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:18,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:44:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:19,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-13 23:44:19,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688472916] [2020-10-13 23:44:19,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:19,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:44:19,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767680829] [2020-10-13 23:44:19,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:44:19,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:44:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:19,166 INFO L87 Difference]: Start difference. First operand 583 states and 777 transitions. Second operand 18 states. [2020-10-13 23:44:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:19,574 INFO L93 Difference]: Finished difference Result 1195 states and 1618 transitions. [2020-10-13 23:44:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:44:19,574 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2020-10-13 23:44:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:19,578 INFO L225 Difference]: With dead ends: 1195 [2020-10-13 23:44:19,578 INFO L226 Difference]: Without dead ends: 647 [2020-10-13 23:44:19,580 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 23:44:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-13 23:44:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 620. [2020-10-13 23:44:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-13 23:44:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 827 transitions. [2020-10-13 23:44:19,605 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 827 transitions. Word has length 183 [2020-10-13 23:44:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:19,605 INFO L479 AbstractCegarLoop]: Abstraction has 620 states and 827 transitions. [2020-10-13 23:44:19,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:44:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 827 transitions. [2020-10-13 23:44:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 23:44:19,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:19,607 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:19,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:44:19,608 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1874619969, now seen corresponding path program 10 times [2020-10-13 23:44:19,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:19,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574688526] [2020-10-13 23:44:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:19,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:20,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:44:24,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:44:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:24,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:24,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:24,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:24,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:24,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:24,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:24,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:24,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:24,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-13 23:44:24,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574688526] [2020-10-13 23:44:24,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:24,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:44:24,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293230471] [2020-10-13 23:44:24,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:44:24,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:44:24,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:24,871 INFO L87 Difference]: Start difference. First operand 620 states and 827 transitions. Second operand 19 states. [2020-10-13 23:44:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:25,291 INFO L93 Difference]: Finished difference Result 1267 states and 1716 transitions. [2020-10-13 23:44:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:44:25,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2020-10-13 23:44:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:25,296 INFO L225 Difference]: With dead ends: 1267 [2020-10-13 23:44:25,297 INFO L226 Difference]: Without dead ends: 684 [2020-10-13 23:44:25,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-13 23:44:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 657. [2020-10-13 23:44:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-13 23:44:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 877 transitions. [2020-10-13 23:44:25,325 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 877 transitions. Word has length 195 [2020-10-13 23:44:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:25,325 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 877 transitions. [2020-10-13 23:44:25,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:44:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 877 transitions. [2020-10-13 23:44:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:44:25,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:25,329 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:25,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:44:25,329 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash -714550044, now seen corresponding path program 11 times [2020-10-13 23:44:25,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:25,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30441806] [2020-10-13 23:44:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:25,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:25,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:26,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:28,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:28,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:29,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:30,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:44:30,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-13 23:44:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:30,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:30,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:30,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:30,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:30,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 331 proven. 217 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2020-10-13 23:44:30,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30441806] [2020-10-13 23:44:30,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:30,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:44:30,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749776793] [2020-10-13 23:44:30,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:44:30,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:30,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:44:30,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:44:30,972 INFO L87 Difference]: Start difference. First operand 657 states and 877 transitions. Second operand 16 states. [2020-10-13 23:44:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:31,747 INFO L93 Difference]: Finished difference Result 1365 states and 1850 transitions. [2020-10-13 23:44:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:44:31,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 207 [2020-10-13 23:44:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:31,755 INFO L225 Difference]: With dead ends: 1365 [2020-10-13 23:44:31,756 INFO L226 Difference]: Without dead ends: 1222 [2020-10-13 23:44:31,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2020-10-13 23:44:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1086. [2020-10-13 23:44:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1086 states. [2020-10-13 23:44:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1445 transitions. [2020-10-13 23:44:31,803 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1445 transitions. Word has length 207 [2020-10-13 23:44:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:31,803 INFO L479 AbstractCegarLoop]: Abstraction has 1086 states and 1445 transitions. [2020-10-13 23:44:31,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:44:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1445 transitions. [2020-10-13 23:44:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:44:31,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:31,807 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:31,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:44:31,808 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 986942564, now seen corresponding path program 12 times [2020-10-13 23:44:31,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:31,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047996633] [2020-10-13 23:44:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:32,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:32,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:36,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:44:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:44:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:44:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:37,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:37,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:37,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:37,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:37,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:37,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:37,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:37,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:37,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:37,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2020-10-13 23:44:37,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047996633] [2020-10-13 23:44:37,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:37,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:44:37,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98760951] [2020-10-13 23:44:37,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:44:37,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:37,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:44:37,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:37,075 INFO L87 Difference]: Start difference. First operand 1086 states and 1445 transitions. Second operand 20 states. [2020-10-13 23:44:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:37,504 INFO L93 Difference]: Finished difference Result 2237 states and 3014 transitions. [2020-10-13 23:44:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:44:37,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2020-10-13 23:44:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:37,510 INFO L225 Difference]: With dead ends: 2237 [2020-10-13 23:44:37,511 INFO L226 Difference]: Without dead ends: 1190 [2020-10-13 23:44:37,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2020-10-13 23:44:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1147. [2020-10-13 23:44:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2020-10-13 23:44:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1527 transitions. [2020-10-13 23:44:37,555 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1527 transitions. Word has length 207 [2020-10-13 23:44:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:37,555 INFO L479 AbstractCegarLoop]: Abstraction has 1147 states and 1527 transitions. [2020-10-13 23:44:37,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:44:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1527 transitions. [2020-10-13 23:44:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 23:44:37,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:37,559 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:37,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:44:37,559 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash 353801821, now seen corresponding path program 13 times [2020-10-13 23:44:37,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:37,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630688431] [2020-10-13 23:44:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:37,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:37,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:37,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:42,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:42,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 23:44:42,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:44:42,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:42,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:44:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:44:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:44:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:42,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:42,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:42,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:42,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:42,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:42,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:42,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:42,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:42,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-10-13 23:44:42,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630688431] [2020-10-13 23:44:42,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:42,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:44:42,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377113109] [2020-10-13 23:44:42,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:44:42,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:44:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:44:42,933 INFO L87 Difference]: Start difference. First operand 1147 states and 1527 transitions. Second operand 21 states. [2020-10-13 23:44:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:43,549 INFO L93 Difference]: Finished difference Result 2357 states and 3176 transitions. [2020-10-13 23:44:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:44:43,550 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2020-10-13 23:44:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:43,557 INFO L225 Difference]: With dead ends: 2357 [2020-10-13 23:44:43,557 INFO L226 Difference]: Without dead ends: 1251 [2020-10-13 23:44:43,560 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 23:44:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-10-13 23:44:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1208. [2020-10-13 23:44:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2020-10-13 23:44:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1609 transitions. [2020-10-13 23:44:43,609 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1609 transitions. Word has length 219 [2020-10-13 23:44:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:43,609 INFO L479 AbstractCegarLoop]: Abstraction has 1208 states and 1609 transitions. [2020-10-13 23:44:43,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:44:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1609 transitions. [2020-10-13 23:44:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 23:44:43,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:43,614 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 14, 14, 14, 14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:43,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:44:43,621 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash 316860992, now seen corresponding path program 14 times [2020-10-13 23:44:43,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:43,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864269097] [2020-10-13 23:44:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:43,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:43,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:48,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:48,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:48,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-13 23:44:48,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:44:48,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:44:48,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:48,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:48,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:44:48,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:48,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-13 23:44:48,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:48,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:48,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:48,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:48,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:48,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:48,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:48,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:48,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:48,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:48,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:48,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:48,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 415 proven. 293 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2020-10-13 23:44:49,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864269097] [2020-10-13 23:44:49,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:49,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:44:49,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688187473] [2020-10-13 23:44:49,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:44:49,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:44:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:49,051 INFO L87 Difference]: Start difference. First operand 1208 states and 1609 transitions. Second operand 18 states. [2020-10-13 23:44:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:50,329 INFO L93 Difference]: Finished difference Result 2577 states and 3452 transitions. [2020-10-13 23:44:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:44:50,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 231 [2020-10-13 23:44:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:50,339 INFO L225 Difference]: With dead ends: 2577 [2020-10-13 23:44:50,339 INFO L226 Difference]: Without dead ends: 2273 [2020-10-13 23:44:50,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:44:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2020-10-13 23:44:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2122. [2020-10-13 23:44:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2020-10-13 23:44:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2778 transitions. [2020-10-13 23:44:50,418 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2778 transitions. Word has length 231 [2020-10-13 23:44:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:50,419 INFO L479 AbstractCegarLoop]: Abstraction has 2122 states and 2778 transitions. [2020-10-13 23:44:50,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:44:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2778 transitions. [2020-10-13 23:44:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 23:44:50,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:50,425 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 13, 13, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:50,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:44:50,425 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:50,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1981627712, now seen corresponding path program 15 times [2020-10-13 23:44:50,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:50,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339216308] [2020-10-13 23:44:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:55,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:44:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:44:55,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:44:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:55,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:55,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:55,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:55,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:55,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:55,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:55,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2020-10-13 23:44:55,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339216308] [2020-10-13 23:44:55,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:55,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:44:55,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725261389] [2020-10-13 23:44:55,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:44:55,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:44:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:55,875 INFO L87 Difference]: Start difference. First operand 2122 states and 2778 transitions. Second operand 22 states. [2020-10-13 23:44:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:56,337 INFO L93 Difference]: Finished difference Result 4385 states and 5802 transitions. [2020-10-13 23:44:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:44:56,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2020-10-13 23:44:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:56,347 INFO L225 Difference]: With dead ends: 4385 [2020-10-13 23:44:56,347 INFO L226 Difference]: Without dead ends: 2306 [2020-10-13 23:44:56,352 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 23:44:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2020-10-13 23:44:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2231. [2020-10-13 23:44:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2231 states. [2020-10-13 23:44:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 2923 transitions. [2020-10-13 23:44:56,424 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 2923 transitions. Word has length 231 [2020-10-13 23:44:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:56,424 INFO L479 AbstractCegarLoop]: Abstraction has 2231 states and 2923 transitions. [2020-10-13 23:44:56,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:44:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 2923 transitions. [2020-10-13 23:44:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 23:44:56,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:56,430 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:56,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:44:56,430 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1437136007, now seen corresponding path program 16 times [2020-10-13 23:44:56,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:56,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736184067] [2020-10-13 23:44:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:56,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:01,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:01,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-13 23:45:01,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:45:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-13 23:45:01,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:01,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:45:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:45:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:45:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:01,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:01,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:01,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:01,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:01,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:01,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:01,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:01,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:01,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:01,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:01,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2020-10-13 23:45:01,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736184067] [2020-10-13 23:45:01,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:01,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:45:01,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914825671] [2020-10-13 23:45:01,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:45:01,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:01,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:45:01,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:45:01,863 INFO L87 Difference]: Start difference. First operand 2231 states and 2923 transitions. Second operand 23 states. [2020-10-13 23:45:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:02,421 INFO L93 Difference]: Finished difference Result 4601 states and 6090 transitions. [2020-10-13 23:45:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:45:02,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2020-10-13 23:45:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:02,431 INFO L225 Difference]: With dead ends: 4601 [2020-10-13 23:45:02,431 INFO L226 Difference]: Without dead ends: 2415 [2020-10-13 23:45:02,436 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 23:45:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2020-10-13 23:45:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2340. [2020-10-13 23:45:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2340 states. [2020-10-13 23:45:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 3068 transitions. [2020-10-13 23:45:02,515 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 3068 transitions. Word has length 243 [2020-10-13 23:45:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:02,515 INFO L479 AbstractCegarLoop]: Abstraction has 2340 states and 3068 transitions. [2020-10-13 23:45:02,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:45:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 3068 transitions. [2020-10-13 23:45:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-13 23:45:02,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:02,521 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:02,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:45:02,522 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash -39813476, now seen corresponding path program 17 times [2020-10-13 23:45:02,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:02,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249020315] [2020-10-13 23:45:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:02,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:07,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-13 23:45:07,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:45:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:45:07,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:07,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:45:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:45:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:45:07,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:07,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:07,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:07,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:07,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2020-10-13 23:45:07,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249020315] [2020-10-13 23:45:07,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:07,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:45:07,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443667620] [2020-10-13 23:45:07,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:45:07,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:07,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:45:07,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:45:07,907 INFO L87 Difference]: Start difference. First operand 2340 states and 3068 transitions. Second operand 24 states. [2020-10-13 23:45:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:08,439 INFO L93 Difference]: Finished difference Result 4817 states and 6378 transitions. [2020-10-13 23:45:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:45:08,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2020-10-13 23:45:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:08,449 INFO L225 Difference]: With dead ends: 4817 [2020-10-13 23:45:08,449 INFO L226 Difference]: Without dead ends: 2524 [2020-10-13 23:45:08,453 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 23:45:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2020-10-13 23:45:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2449. [2020-10-13 23:45:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2449 states. [2020-10-13 23:45:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3213 transitions. [2020-10-13 23:45:08,529 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3213 transitions. Word has length 255 [2020-10-13 23:45:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:08,529 INFO L479 AbstractCegarLoop]: Abstraction has 2449 states and 3213 transitions. [2020-10-13 23:45:08,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:45:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3213 transitions. [2020-10-13 23:45:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-13 23:45:08,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:08,537 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:08,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:45:08,538 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash -255903979, now seen corresponding path program 18 times [2020-10-13 23:45:08,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:08,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681075355] [2020-10-13 23:45:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:08,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:11,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:12,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:13,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-13 23:45:13,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-13 23:45:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:13,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:13,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:13,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:13,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:13,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 626 proven. 436 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-13 23:45:14,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681075355] [2020-10-13 23:45:14,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:14,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:45:14,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986739009] [2020-10-13 23:45:14,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:45:14,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:45:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:45:14,003 INFO L87 Difference]: Start difference. First operand 2449 states and 3213 transitions. Second operand 20 states. [2020-10-13 23:45:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:15,255 INFO L93 Difference]: Finished difference Result 4828 states and 6353 transitions. [2020-10-13 23:45:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:45:15,255 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 267 [2020-10-13 23:45:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:15,274 INFO L225 Difference]: With dead ends: 4828 [2020-10-13 23:45:15,274 INFO L226 Difference]: Without dead ends: 4652 [2020-10-13 23:45:15,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:45:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4652 states. [2020-10-13 23:45:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4652 to 4483. [2020-10-13 23:45:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4483 states. [2020-10-13 23:45:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 5883 transitions. [2020-10-13 23:45:15,414 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 5883 transitions. Word has length 267 [2020-10-13 23:45:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:15,414 INFO L479 AbstractCegarLoop]: Abstraction has 4483 states and 5883 transitions. [2020-10-13 23:45:15,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:45:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 5883 transitions. [2020-10-13 23:45:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-13 23:45:15,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:15,426 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 15, 15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:15,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:45:15,426 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:15,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -858116203, now seen corresponding path program 19 times [2020-10-13 23:45:15,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:15,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566956076] [2020-10-13 23:45:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:16,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:18,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:20,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:45:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:45:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:45:20,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:20,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:20,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:20,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:20,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:20,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:20,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:20,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:20,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-13 23:45:20,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566956076] [2020-10-13 23:45:20,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:20,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:45:20,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941110906] [2020-10-13 23:45:20,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:45:20,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:20,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:45:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:45:20,858 INFO L87 Difference]: Start difference. First operand 4483 states and 5883 transitions. Second operand 25 states. [2020-10-13 23:45:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:21,450 INFO L93 Difference]: Finished difference Result 9261 states and 12262 transitions. [2020-10-13 23:45:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:45:21,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2020-10-13 23:45:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:21,469 INFO L225 Difference]: With dead ends: 9261 [2020-10-13 23:45:21,469 INFO L226 Difference]: Without dead ends: 4827 [2020-10-13 23:45:21,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:45:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2020-10-13 23:45:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 4688. [2020-10-13 23:45:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4688 states. [2020-10-13 23:45:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 6156 transitions. [2020-10-13 23:45:21,615 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 6156 transitions. Word has length 267 [2020-10-13 23:45:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:21,615 INFO L479 AbstractCegarLoop]: Abstraction has 4688 states and 6156 transitions. [2020-10-13 23:45:21,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:45:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 6156 transitions. [2020-10-13 23:45:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-13 23:45:21,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:21,625 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:21,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:45:21,626 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1581051896, now seen corresponding path program 20 times [2020-10-13 23:45:21,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:21,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670027010] [2020-10-13 23:45:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:26,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:26,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:45:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:27,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:27,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:27,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:27,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:27,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:27,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:27,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:27,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2020-10-13 23:45:27,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670027010] [2020-10-13 23:45:27,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:27,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:45:27,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394786887] [2020-10-13 23:45:27,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:45:27,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:45:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:45:27,079 INFO L87 Difference]: Start difference. First operand 4688 states and 6156 transitions. Second operand 26 states. [2020-10-13 23:45:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:27,808 INFO L93 Difference]: Finished difference Result 9669 states and 12806 transitions. [2020-10-13 23:45:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:45:27,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2020-10-13 23:45:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:27,821 INFO L225 Difference]: With dead ends: 9669 [2020-10-13 23:45:27,821 INFO L226 Difference]: Without dead ends: 5032 [2020-10-13 23:45:27,828 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 23:45:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2020-10-13 23:45:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 4893. [2020-10-13 23:45:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4893 states. [2020-10-13 23:45:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 6429 transitions. [2020-10-13 23:45:27,966 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 6429 transitions. Word has length 279 [2020-10-13 23:45:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:27,966 INFO L479 AbstractCegarLoop]: Abstraction has 4893 states and 6429 transitions. [2020-10-13 23:45:27,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:45:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 6429 transitions. [2020-10-13 23:45:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 23:45:27,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:27,975 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 17, 17, 17, 17, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:27,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:45:27,975 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1280502065, now seen corresponding path program 21 times [2020-10-13 23:45:27,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:27,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002867879] [2020-10-13 23:45:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:29,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:33,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-13 23:45:33,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:33,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:33,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 741 proven. 539 refuted. 0 times theorem prover too weak. 1825 trivial. 0 not checked. [2020-10-13 23:45:33,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002867879] [2020-10-13 23:45:33,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:33,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:45:33,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927780344] [2020-10-13 23:45:33,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:45:33,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:33,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:45:33,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:45:33,528 INFO L87 Difference]: Start difference. First operand 4893 states and 6429 transitions. Second operand 22 states. [2020-10-13 23:45:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:35,658 INFO L93 Difference]: Finished difference Result 9532 states and 12541 transitions. [2020-10-13 23:45:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:45:35,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 291 [2020-10-13 23:45:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:35,675 INFO L225 Difference]: With dead ends: 9532 [2020-10-13 23:45:35,676 INFO L226 Difference]: Without dead ends: 9345 [2020-10-13 23:45:35,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:45:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2020-10-13 23:45:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 9161. [2020-10-13 23:45:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9161 states. [2020-10-13 23:45:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 12037 transitions. [2020-10-13 23:45:35,959 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 12037 transitions. Word has length 291 [2020-10-13 23:45:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:35,959 INFO L479 AbstractCegarLoop]: Abstraction has 9161 states and 12037 transitions. [2020-10-13 23:45:35,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:45:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 12037 transitions. [2020-10-13 23:45:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 23:45:35,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:35,970 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 16, 16, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:35,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:45:35,970 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:35,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1828233039, now seen corresponding path program 22 times [2020-10-13 23:45:35,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:35,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808135813] [2020-10-13 23:45:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:37,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:38,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 23:45:41,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:45:41,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:41,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:41,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:41,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:41,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:41,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:41,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2323 trivial. 0 not checked. [2020-10-13 23:45:41,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808135813] [2020-10-13 23:45:41,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:41,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:45:41,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84143728] [2020-10-13 23:45:41,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:45:41,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:45:41,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:45:41,526 INFO L87 Difference]: Start difference. First operand 9161 states and 12037 transitions. Second operand 27 states. [2020-10-13 23:45:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:42,411 INFO L93 Difference]: Finished difference Result 18933 states and 25078 transitions. [2020-10-13 23:45:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:45:42,412 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2020-10-13 23:45:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:42,431 INFO L225 Difference]: With dead ends: 18933 [2020-10-13 23:45:42,432 INFO L226 Difference]: Without dead ends: 9825 [2020-10-13 23:45:42,447 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 23:45:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9825 states. [2020-10-13 23:45:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9825 to 9558. [2020-10-13 23:45:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9558 states. [2020-10-13 23:45:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 12566 transitions. [2020-10-13 23:45:42,726 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 12566 transitions. Word has length 291 [2020-10-13 23:45:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:42,727 INFO L479 AbstractCegarLoop]: Abstraction has 9558 states and 12566 transitions. [2020-10-13 23:45:42,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:45:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 12566 transitions. [2020-10-13 23:45:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-13 23:45:42,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:42,738 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 17, 17, 17, 17, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:42,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:45:42,739 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash 473243732, now seen corresponding path program 23 times [2020-10-13 23:45:42,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:42,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019453193] [2020-10-13 23:45:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:42,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:47,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:47,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-13 23:45:47,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:45:47,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:45:47,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:47,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:45:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:45:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:45:47,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:48,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2020-10-13 23:45:48,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019453193] [2020-10-13 23:45:48,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:48,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:45:48,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50368967] [2020-10-13 23:45:48,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:45:48,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:45:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:45:48,251 INFO L87 Difference]: Start difference. First operand 9558 states and 12566 transitions. Second operand 28 states. [2020-10-13 23:45:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:49,172 INFO L93 Difference]: Finished difference Result 19725 states and 26134 transitions. [2020-10-13 23:45:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:45:49,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2020-10-13 23:45:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:49,188 INFO L225 Difference]: With dead ends: 19725 [2020-10-13 23:45:49,188 INFO L226 Difference]: Without dead ends: 10222 [2020-10-13 23:45:49,203 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 23:45:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10222 states. [2020-10-13 23:45:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10222 to 9955. [2020-10-13 23:45:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9955 states. [2020-10-13 23:45:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9955 states to 9955 states and 13095 transitions. [2020-10-13 23:45:49,526 INFO L78 Accepts]: Start accepts. Automaton has 9955 states and 13095 transitions. Word has length 303 [2020-10-13 23:45:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:49,526 INFO L479 AbstractCegarLoop]: Abstraction has 9955 states and 13095 transitions. [2020-10-13 23:45:49,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:45:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 9955 states and 13095 transitions. [2020-10-13 23:45:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-13 23:45:49,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:49,544 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 18, 18, 18, 18, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:49,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:45:49,544 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash 703162445, now seen corresponding path program 24 times [2020-10-13 23:45:49,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:49,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536097190] [2020-10-13 23:45:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:49,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:49,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:49,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:50,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:54,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:54,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-13 23:45:54,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:45:54,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 23:45:54,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:54,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:54,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:45:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:45:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:45:54,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:55,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:55,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:55,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:55,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:55,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2020-10-13 23:45:55,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536097190] [2020-10-13 23:45:55,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:55,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:45:55,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455166096] [2020-10-13 23:45:55,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:45:55,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:55,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:45:55,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:45:55,097 INFO L87 Difference]: Start difference. First operand 9955 states and 13095 transitions. Second operand 29 states. [2020-10-13 23:45:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:55,909 INFO L93 Difference]: Finished difference Result 20517 states and 27190 transitions. [2020-10-13 23:45:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:45:55,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2020-10-13 23:45:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:55,920 INFO L225 Difference]: With dead ends: 20517 [2020-10-13 23:45:55,920 INFO L226 Difference]: Without dead ends: 10619 [2020-10-13 23:45:55,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:45:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10619 states. [2020-10-13 23:45:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10619 to 10352. [2020-10-13 23:45:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10352 states. [2020-10-13 23:45:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10352 states to 10352 states and 13624 transitions. [2020-10-13 23:45:56,193 INFO L78 Accepts]: Start accepts. Automaton has 10352 states and 13624 transitions. Word has length 315 [2020-10-13 23:45:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:56,194 INFO L479 AbstractCegarLoop]: Abstraction has 10352 states and 13624 transitions. [2020-10-13 23:45:56,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:45:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10352 states and 13624 transitions. [2020-10-13 23:45:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-13 23:45:56,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:56,208 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 19, 19, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:56,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:45:56,209 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1202022864, now seen corresponding path program 25 times [2020-10-13 23:45:56,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:56,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660266339] [2020-10-13 23:45:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:56,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:56,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:56,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:57,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:01,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-13 23:46:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:02,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:02,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:02,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:02,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:02,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 994 proven. 724 refuted. 0 times theorem prover too weak. 2260 trivial. 0 not checked. [2020-10-13 23:46:02,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660266339] [2020-10-13 23:46:02,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:02,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:46:02,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892507979] [2020-10-13 23:46:02,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:46:02,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:46:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:46:02,205 INFO L87 Difference]: Start difference. First operand 10352 states and 13624 transitions. Second operand 24 states. [2020-10-13 23:46:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:04,637 INFO L93 Difference]: Finished difference Result 20081 states and 26442 transitions. [2020-10-13 23:46:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:46:04,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 327 [2020-10-13 23:46:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:04,657 INFO L225 Difference]: With dead ends: 20081 [2020-10-13 23:46:04,657 INFO L226 Difference]: Without dead ends: 19872 [2020-10-13 23:46:04,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:46:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19872 states. [2020-10-13 23:46:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19872 to 19670. [2020-10-13 23:46:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19670 states. [2020-10-13 23:46:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19670 states to 19670 states and 25882 transitions. [2020-10-13 23:46:05,083 INFO L78 Accepts]: Start accepts. Automaton has 19670 states and 25882 transitions. Word has length 327 [2020-10-13 23:46:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:05,084 INFO L479 AbstractCegarLoop]: Abstraction has 19670 states and 25882 transitions. [2020-10-13 23:46:05,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:46:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 19670 states and 25882 transitions. [2020-10-13 23:46:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-13 23:46:05,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:05,099 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 18, 18, 18, 18, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:05,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:46:05,100 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash 539487664, now seen corresponding path program 26 times [2020-10-13 23:46:05,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:05,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938326423] [2020-10-13 23:46:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:05,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:05,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:10,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-13 23:46:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:46:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5231 [2020-10-13 23:46:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:10,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:46:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 23:46:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:46:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:10,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:10,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:10,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:10,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:10,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:10,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:10,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 2977 trivial. 0 not checked. [2020-10-13 23:46:10,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938326423] [2020-10-13 23:46:10,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:10,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:46:10,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743979087] [2020-10-13 23:46:10,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:46:10,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:10,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:46:10,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:46:10,882 INFO L87 Difference]: Start difference. First operand 19670 states and 25882 transitions. Second operand 30 states. [2020-10-13 23:46:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:11,944 INFO L93 Difference]: Finished difference Result 40585 states and 53786 transitions. [2020-10-13 23:46:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:46:11,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2020-10-13 23:46:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:11,964 INFO L225 Difference]: With dead ends: 40585 [2020-10-13 23:46:11,964 INFO L226 Difference]: Without dead ends: 20974 [2020-10-13 23:46:11,987 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 23:46:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20974 states. [2020-10-13 23:46:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20974 to 20451. [2020-10-13 23:46:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20451 states. [2020-10-13 23:46:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20451 states to 20451 states and 26923 transitions. [2020-10-13 23:46:12,457 INFO L78 Accepts]: Start accepts. Automaton has 20451 states and 26923 transitions. Word has length 327 [2020-10-13 23:46:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:12,458 INFO L479 AbstractCegarLoop]: Abstraction has 20451 states and 26923 transitions. [2020-10-13 23:46:12,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:46:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20451 states and 26923 transitions. [2020-10-13 23:46:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-13 23:46:12,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:12,478 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 19, 19, 19, 19, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:12,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:46:12,479 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1076357527, now seen corresponding path program 27 times [2020-10-13 23:46:12,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:12,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512581733] [2020-10-13 23:46:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking...