/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-fpi/condg.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:50:24,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:50:24,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:50:24,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:50:24,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:50:24,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:50:24,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:50:24,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:50:24,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:50:24,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:50:24,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:50:24,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:50:24,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:50:24,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:50:24,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:50:24,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:50:24,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:50:24,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:50:24,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:50:24,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:50:24,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:50:24,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:50:24,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:50:24,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:50:24,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:50:24,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:50:24,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:50:24,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:50:24,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:50:24,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:50:24,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:50:24,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:50:24,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:50:24,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:50:24,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:50:24,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:50:24,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:50:24,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:50:24,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:50:24,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:50:24,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:50:24,762 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 23:50:24,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:50:24,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:50:24,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:50:24,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:50:24,788 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:50:24,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:50:24,789 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:50:24,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:50:24,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:50:24,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:50:24,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:50:24,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:50:24,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:50:24,790 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:50:24,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:50:24,791 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:50:24,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:50:24,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:50:24,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:50:24,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:50:24,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:50:24,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:50:24,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:50:24,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:50:24,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:50:24,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:50:24,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:50:24,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:50:24,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:50:24,793 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 23:50:25,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:50:25,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:50:25,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:50:25,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:50:25,155 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:50:25,155 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condg.c [2020-10-13 23:50:25,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c53f542b8/454b94f40bf74d1ab0212359e39cb8ca/FLAG62f7345bc [2020-10-13 23:50:25,613 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:50:25,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condg.c [2020-10-13 23:50:25,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c53f542b8/454b94f40bf74d1ab0212359e39cb8ca/FLAG62f7345bc [2020-10-13 23:50:26,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c53f542b8/454b94f40bf74d1ab0212359e39cb8ca [2020-10-13 23:50:26,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:50:26,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:50:26,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:50:26,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:50:26,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:50:26,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa6a448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26, skipping insertion in model container [2020-10-13 23:50:26,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:50:26,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:50:26,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:50:26,306 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:50:26,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:50:26,371 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:50:26,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26 WrapperNode [2020-10-13 23:50:26,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:50:26,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:50:26,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:50:26,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:50:26,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (1/1) ... [2020-10-13 23:50:26,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:50:26,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:50:26,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:50:26,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:50:26,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (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 23:50:26,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:50:26,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:50:26,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:50:26,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:50:26,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:50:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:50:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:50:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:50:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:50:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:50:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:50:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:50:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:50:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:50:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:50:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:50:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:50:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:50:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:50:26,893 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:50:26,894 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:50:26,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:50:26 BoogieIcfgContainer [2020-10-13 23:50:26,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:50:26,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:50:26,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:50:26,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:50:26,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:50:26" (1/3) ... [2020-10-13 23:50:26,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7036ca4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:50:26, skipping insertion in model container [2020-10-13 23:50:26,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:26" (2/3) ... [2020-10-13 23:50:26,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7036ca4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:50:26, skipping insertion in model container [2020-10-13 23:50:26,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:50:26" (3/3) ... [2020-10-13 23:50:26,907 INFO L109 eAbstractionObserver]: Analyzing ICFG condg.c [2020-10-13 23:50:26,918 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:50:26,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:50:26,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:50:26,978 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:50:26,979 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:50:26,979 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:50:26,979 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:50:26,979 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:50:26,979 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:50:26,980 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:50:26,980 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:50:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-13 23:50:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:50:27,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:27,023 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] [2020-10-13 23:50:27,023 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:27,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-10-13 23:50:27,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:27,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106107277] [2020-10-13 23:50:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:27,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:28,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:50:28,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:50:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-13 23:50:28,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:28,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:28,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:28,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:50:28,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:28,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:50:28,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:28,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:28,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:28,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:28,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:28,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:28,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:28,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:28,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:28,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:28,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:28,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:50:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:28,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:28,233 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 23:50:28,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106107277] [2020-10-13 23:50:28,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:50:28,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:50:28,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449954596] [2020-10-13 23:50:28,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:50:28,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:50:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:50:28,263 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-13 23:50:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:28,375 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2020-10-13 23:50:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:50:28,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 23:50:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:28,386 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:50:28,387 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 23:50:28,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 23:50:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 23:50:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 23:50:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:50:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-13 23:50:28,439 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-13 23:50:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:28,439 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-13 23:50:28,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:50:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-13 23:50:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:50:28,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:28,441 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] [2020-10-13 23:50:28,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:50:28,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash 34447140, now seen corresponding path program 1 times [2020-10-13 23:50:28,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:28,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096336662] [2020-10-13 23:50:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:29,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:50:29,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:50:29,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-13 23:50:29,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:29,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:29,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:50:29,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:50:29,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:50:29,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:29,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:29,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:29,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:29,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:29,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:50:29,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:29,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:29,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:29,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:29,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:29,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:29,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:29,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:29,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:50:29,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:29,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:50:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:50:29,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:29,113 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 23:50:29,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096336662] [2020-10-13 23:50:29,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:50:29,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:50:29,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136846768] [2020-10-13 23:50:29,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:50:29,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:29,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:50:29,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:50:29,119 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-10-13 23:50:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:29,332 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-13 23:50:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:50:29,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 23:50:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:29,334 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:50:29,334 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:50:29,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:50:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 23:50:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:50:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-13 23:50:29,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-13 23:50:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:29,356 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-13 23:50:29,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:50:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-13 23:50:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:50:29,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:29,360 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, 1, 1, 1, 1] [2020-10-13 23:50:29,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:50:29,362 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-10-13 23:50:29,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:29,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346377926] [2020-10-13 23:50:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:29,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:30,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:30,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:50:30,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:50:30,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-10-13 23:50:30,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:30,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:50:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:50:30,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:31,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:31,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:31,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:31,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:31,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:31,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:31,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:31,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:31,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:31,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:31,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:31,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:31,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:31,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:31,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:31,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:31,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:50:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:31,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346377926] [2020-10-13 23:50:31,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:31,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:50:31,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844859879] [2020-10-13 23:50:31,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:50:31,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:50:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:50:31,208 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2020-10-13 23:50:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:31,797 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-13 23:50:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:50:31,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 23:50:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:31,807 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:50:31,808 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:50:31,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:50:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:50:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-10-13 23:50:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:50:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-13 23:50:31,843 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2020-10-13 23:50:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:31,844 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-13 23:50:31,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:50:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-13 23:50:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:50:31,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:31,846 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, 1, 1, 1, 1] [2020-10-13 23:50:31,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:50:31,847 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-10-13 23:50:31,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:31,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934229599] [2020-10-13 23:50:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:33,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:33,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:50:33,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:50:33,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1705 [2020-10-13 23:50:33,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:33,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:50:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:50:33,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:33,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:33,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:33,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:33,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:33,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:33,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:33,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:34,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:34,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:34,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:34,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:34,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:34,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:34,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:34,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934229599] [2020-10-13 23:50:34,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:34,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:50:34,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756711636] [2020-10-13 23:50:34,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:50:34,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:50:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:50:34,012 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 12 states. [2020-10-13 23:50:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:34,578 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-13 23:50:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:50:34,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 23:50:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:34,582 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:50:34,582 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:50:34,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:50:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:50:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-10-13 23:50:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:50:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-13 23:50:34,595 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 31 [2020-10-13 23:50:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:34,595 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-13 23:50:34,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:50:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-13 23:50:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:50:34,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:34,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:34,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:50:34,598 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:34,598 INFO L82 PathProgramCache]: Analyzing trace with hash 388345480, now seen corresponding path program 2 times [2020-10-13 23:50:34,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:34,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067116918] [2020-10-13 23:50:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:34,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:50:35,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-13 23:50:35,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:50:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:50:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:50:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:35,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:35,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:35,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:35,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:35,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:35,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:35,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:35,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:35,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:50:35,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067116918] [2020-10-13 23:50:35,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:35,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:50:35,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982251174] [2020-10-13 23:50:35,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:50:35,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:35,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:50:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:50:35,221 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 8 states. [2020-10-13 23:50:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:35,681 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-13 23:50:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:50:35,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-13 23:50:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:35,684 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:50:35,684 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:50:35,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:50:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:50:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-13 23:50:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:50:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-13 23:50:35,695 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 33 [2020-10-13 23:50:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:35,696 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-13 23:50:35,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:50:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-13 23:50:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:50:35,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:35,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:35,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:50:35,699 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:35,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1041170080, now seen corresponding path program 2 times [2020-10-13 23:50:35,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:35,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938516296] [2020-10-13 23:50:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:35,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:38,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:39,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:50:39,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:50:39,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3882 [2020-10-13 23:50:39,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:39,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:39,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:50:39,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:39,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:50:39,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:39,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:39,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:39,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:39,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:39,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:39,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:39,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:39,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:50:39,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938516296] [2020-10-13 23:50:39,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:39,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:50:39,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141379893] [2020-10-13 23:50:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:50:39,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:50:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:50:39,668 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 8 states. [2020-10-13 23:50:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:39,939 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-10-13 23:50:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:50:39,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-13 23:50:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:39,942 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:50:39,942 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:50:39,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:50:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:50:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-13 23:50:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:50:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-13 23:50:39,959 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 34 [2020-10-13 23:50:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:39,960 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-13 23:50:39,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:50:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-13 23:50:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:50:39,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:39,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:39,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:50:39,971 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:39,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1790958820, now seen corresponding path program 3 times [2020-10-13 23:50:39,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:39,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615903868] [2020-10-13 23:50:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:44,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:50:44,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:50:44,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:50:44,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:44,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:44,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:50:44,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:44,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:50:44,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:45,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:45,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:45,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:45,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:45,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:45,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:45,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:45,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:45,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:45,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:45,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:50:45,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:45,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:45,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:45,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615903868] [2020-10-13 23:50:45,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:45,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:50:45,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537128462] [2020-10-13 23:50:45,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:50:45,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:45,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:50:45,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:50:45,948 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 21 states. [2020-10-13 23:50:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:47,671 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-13 23:50:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:50:47,672 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-10-13 23:50:47,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:47,673 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:50:47,674 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:50:47,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:50:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:50:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-13 23:50:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:50:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-13 23:50:47,692 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 38 [2020-10-13 23:50:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:47,692 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-13 23:50:47,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:50:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-13 23:50:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:50:47,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:47,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:47,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:50:47,694 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:47,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1110900450, now seen corresponding path program 1 times [2020-10-13 23:50:47,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:47,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636232282] [2020-10-13 23:50:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:47,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:47,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:52,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:50:52,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:50:52,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:50:52,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:52,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:52,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:50:52,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:52,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:50:52,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:52,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:52,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:52,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:52,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:52,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:52,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:52,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:52,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:52,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:52,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:52,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:52,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:50:52,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636232282] [2020-10-13 23:50:52,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:52,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:50:52,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957260637] [2020-10-13 23:50:52,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:50:52,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:50:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:52,802 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 7 states. [2020-10-13 23:50:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:52,936 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 23:50:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:50:52,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 23:50:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:52,937 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:50:52,938 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:50:52,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:50:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:50:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-10-13 23:50:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:50:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-10-13 23:50:52,955 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 38 [2020-10-13 23:50:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:52,956 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-10-13 23:50:52,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:50:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-10-13 23:50:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:50:52,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:52,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:52,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:50:52,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1532793382, now seen corresponding path program 2 times [2020-10-13 23:50:52,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:52,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256363723] [2020-10-13 23:50:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:52,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:54,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:57,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:57,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:50:57,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 23:50:57,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:50:57,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:57,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:50:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:50:57,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:58,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:58,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:58,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:58,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:58,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:58,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:58,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:58,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:58,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:58,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:58,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:50:58,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256363723] [2020-10-13 23:50:58,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:58,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:50:58,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161128048] [2020-10-13 23:50:58,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:50:58,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:50:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:58,058 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 7 states. [2020-10-13 23:50:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:58,208 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-13 23:50:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:50:58,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 23:50:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:58,212 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:50:58,212 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:50:58,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:50:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:50:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-10-13 23:50:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:50:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 23:50:58,225 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 38 [2020-10-13 23:50:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:58,226 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 23:50:58,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:50:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 23:50:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:50:58,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:58,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:58,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:50:58,229 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:58,230 INFO L82 PathProgramCache]: Analyzing trace with hash -852735012, now seen corresponding path program 3 times [2020-10-13 23:50:58,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:58,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642796725] [2020-10-13 23:50:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:58,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:59,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:01,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:01,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:51:01,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 23:51:01,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3508 [2020-10-13 23:51:01,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:01,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:51:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:51:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:02,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:02,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:02,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:02,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:02,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:02,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:02,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:02,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:02,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:02,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:02,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:02,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:02,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:02,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:02,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642796725] [2020-10-13 23:51:02,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:02,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:51:02,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340573640] [2020-10-13 23:51:02,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:51:02,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:51:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:51:02,423 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 18 states. [2020-10-13 23:51:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:04,297 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-10-13 23:51:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:51:04,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-13 23:51:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:04,300 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:51:04,300 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:51:04,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=1294, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:51:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:51:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-13 23:51:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:51:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-13 23:51:04,312 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 38 [2020-10-13 23:51:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:04,312 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-13 23:51:04,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:51:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-13 23:51:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:51:04,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:04,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:04,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:51:04,314 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash -162299750, now seen corresponding path program 4 times [2020-10-13 23:51:04,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:04,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124350453] [2020-10-13 23:51:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:04,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:04,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:06,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:09,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:51:09,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:51:09,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:51:09,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:09,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:51:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:51:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:51:09,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:09,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:09,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:09,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:09,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:09,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:09,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:09,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:09,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:51:09,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124350453] [2020-10-13 23:51:09,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:09,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:51:09,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987941986] [2020-10-13 23:51:09,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:51:09,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:51:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:51:09,398 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 10 states. [2020-10-13 23:51:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:09,948 INFO L93 Difference]: Finished difference Result 143 states and 161 transitions. [2020-10-13 23:51:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:51:09,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 23:51:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:09,950 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:51:09,950 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:51:09,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:51:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:51:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-10-13 23:51:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:51:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-13 23:51:09,963 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 40 [2020-10-13 23:51:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:09,964 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-13 23:51:09,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:51:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-13 23:51:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:51:09,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:09,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:09,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:51:09,965 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1840415864, now seen corresponding path program 5 times [2020-10-13 23:51:09,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:09,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243930546] [2020-10-13 23:51:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:09,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:10,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:10,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:14,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:14,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:14,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:51:14,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:51:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:51:14,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:14,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:51:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:51:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:15,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:15,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:15,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:15,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:15,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:15,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:15,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:15,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:15,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:15,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:15,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:15,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:15,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:15,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:15,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:15,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:15,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:15,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:15,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:51:15,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243930546] [2020-10-13 23:51:15,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:15,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:51:15,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751428006] [2020-10-13 23:51:15,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:51:15,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:15,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:51:15,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:51:15,056 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 10 states. [2020-10-13 23:51:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:15,436 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2020-10-13 23:51:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:51:15,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-13 23:51:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:15,438 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:51:15,438 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:51:15,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:51:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:51:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2020-10-13 23:51:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:51:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-13 23:51:15,451 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 41 [2020-10-13 23:51:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:15,452 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-13 23:51:15,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:51:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-13 23:51:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:51:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:15,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:15,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:51:15,453 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2092450446, now seen corresponding path program 1 times [2020-10-13 23:51:15,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:15,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109026946] [2020-10-13 23:51:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:15,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:20,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:51:20,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-13 23:51:20,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:51:20,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:20,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:20,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:51:20,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:20,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:51:20,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:21,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:21,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:21,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:21,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:51:21,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:21,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:21,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:21,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:21,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:21,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:21,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:21,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:21,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:21,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:21,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:21,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:21,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:51:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:21,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:21,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:21,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:51:21,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:21,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:51:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:51:21,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:51:21,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109026946] [2020-10-13 23:51:21,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:21,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:51:21,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175808313] [2020-10-13 23:51:21,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:51:21,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:51:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:51:21,412 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 21 states. [2020-10-13 23:51:22,345 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 23:51:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:24,262 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-13 23:51:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:51:24,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-13 23:51:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:24,264 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:51:24,264 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:51:24,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:51:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:51:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2020-10-13 23:51:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:51:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-13 23:51:24,275 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 46 [2020-10-13 23:51:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:24,276 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-13 23:51:24,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:51:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-13 23:51:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:51:24,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:24,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:24,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:51:24,278 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash -264159668, now seen corresponding path program 6 times [2020-10-13 23:51:24,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:24,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291206177] [2020-10-13 23:51:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:24,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:27,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:28,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:28,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:51:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:29,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:29,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:29,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:29,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:29,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:29,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:29,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:29,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:29,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:29,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:29,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:51:29,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291206177] [2020-10-13 23:51:29,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:29,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:51:29,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350875818] [2020-10-13 23:51:29,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:51:29,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:51:29,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:51:29,705 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 18 states. [2020-10-13 23:51:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:30,471 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-13 23:51:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:51:30,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-13 23:51:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:30,472 INFO L225 Difference]: With dead ends: 73 [2020-10-13 23:51:30,473 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:51:30,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:51:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:51:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-13 23:51:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:51:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-13 23:51:30,482 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 45 [2020-10-13 23:51:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:30,483 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-13 23:51:30,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:51:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-13 23:51:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:51:30,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:30,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:30,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:51:30,484 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash -605799538, now seen corresponding path program 4 times [2020-10-13 23:51:30,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:30,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017524565] [2020-10-13 23:51:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:30,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:31,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:33,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:35,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:51:35,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-13 23:51:35,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:51:35,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:35,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:51:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:51:35,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:36,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:36,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:36,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:36,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:36,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:36,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:36,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:36,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:36,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:36,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:36,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017524565] [2020-10-13 23:51:36,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:36,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:51:36,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694295586] [2020-10-13 23:51:36,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:51:36,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:51:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:51:36,738 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 22 states. [2020-10-13 23:51:37,476 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-13 23:51:37,657 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-13 23:51:38,231 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2020-10-13 23:51:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:39,867 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2020-10-13 23:51:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:51:39,868 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-13 23:51:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:39,870 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:51:39,870 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:51:39,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:51:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:51:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-10-13 23:51:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:51:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-13 23:51:39,888 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 45 [2020-10-13 23:51:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:39,889 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-13 23:51:39,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:51:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-13 23:51:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:51:39,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:39,890 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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 23:51:39,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:51:39,890 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1288639448, now seen corresponding path program 5 times [2020-10-13 23:51:39,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:39,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469257235] [2020-10-13 23:51:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:40,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:44,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:51:44,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:51:44,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:51:44,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:44,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:44,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:51:44,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:44,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:51:44,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:44,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:45,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:45,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:45,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:51:45,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:45,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:45,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:45,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:45,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:45,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:45,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:45,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:45,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:45,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:51:45,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469257235] [2020-10-13 23:51:45,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:45,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:51:45,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468472441] [2020-10-13 23:51:45,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:51:45,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:51:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:51:45,013 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 12 states. [2020-10-13 23:51:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:45,489 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2020-10-13 23:51:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:51:45,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 23:51:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:45,492 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:51:45,493 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:51:45,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:51:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:51:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2020-10-13 23:51:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 23:51:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-10-13 23:51:45,509 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 48 [2020-10-13 23:51:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:45,509 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-10-13 23:51:45,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:51:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-10-13 23:51:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:51:45,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:45,510 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:45,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:51:45,510 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1372760226, now seen corresponding path program 2 times [2020-10-13 23:51:45,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:45,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161106663] [2020-10-13 23:51:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:48,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:50,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:51:50,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:51:50,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:51:50,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:50,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:51:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:51:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:51:51,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:51,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:51,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:51,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:51,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:51,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:51,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:51,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:51,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:51,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:51,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:51,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:51,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:51,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:51:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:51,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:51,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:51,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:51,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:51,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:51:51,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:51,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:51,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:51:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:51:51,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:51:51,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161106663] [2020-10-13 23:51:51,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:51,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:51:51,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543137329] [2020-10-13 23:51:51,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:51:51,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:51:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:51:51,656 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 24 states. [2020-10-13 23:51:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:53,509 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2020-10-13 23:51:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:51:53,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-13 23:51:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:53,510 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:51:53,511 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:51:53,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:51:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:51:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2020-10-13 23:51:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:51:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-13 23:51:53,529 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 53 [2020-10-13 23:51:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:53,530 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-13 23:51:53,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:51:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-13 23:51:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:51:53,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:53,532 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:53,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:51:53,532 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1871731860, now seen corresponding path program 6 times [2020-10-13 23:51:53,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:53,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028275301] [2020-10-13 23:51:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:54,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:54,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:58,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:51:58,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-13 23:51:58,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:51:58,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:58,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:51:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:51:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:58,607 ERROR L253 erpolLogProxyWrapper]: Interpolant 22 not inductive [2020-10-13 23:51:58,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:51:58,619 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-13 23:51:58,624 INFO L168 Benchmark]: Toolchain (without parser) took 92603.77 ms. Allocated memory was 145.2 MB in the beginning and 892.9 MB in the end (delta: 747.6 MB). Free memory was 101.1 MB in the beginning and 488.4 MB in the end (delta: -387.3 MB). Peak memory consumption was 769.9 MB. Max. memory is 7.1 GB. [2020-10-13 23:51:58,624 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-13 23:51:58,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.94 ms. Allocated memory is still 145.2 MB. Free memory was 101.1 MB in the beginning and 90.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-10-13 23:51:58,625 INFO L168 Benchmark]: Boogie Preprocessor took 162.80 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 90.4 MB in the beginning and 178.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 23:51:58,626 INFO L168 Benchmark]: RCFGBuilder took 361.60 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 159.3 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-10-13 23:51:58,627 INFO L168 Benchmark]: TraceAbstraction took 91722.04 ms. Allocated memory was 201.3 MB in the beginning and 892.9 MB in the end (delta: 691.5 MB). Free memory was 159.3 MB in the beginning and 488.4 MB in the end (delta: -329.1 MB). Peak memory consumption was 772.0 MB. Max. memory is 7.1 GB. [2020-10-13 23:51:58,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.94 ms. Allocated memory is still 145.2 MB. Free memory was 101.1 MB in the beginning and 90.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.80 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 90.4 MB in the beginning and 178.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.60 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 159.3 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 91722.04 ms. Allocated memory was 201.3 MB in the beginning and 892.9 MB in the end (delta: 691.5 MB). Free memory was 159.3 MB in the beginning and 488.4 MB in the end (delta: -329.1 MB). Peak memory consumption was 772.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...