/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-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:22:31,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:22:31,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:22:31,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:22:31,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:22:31,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:22:31,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:22:31,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:22:31,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:22:31,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:22:31,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:22:31,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:22:31,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:22:31,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:22:31,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:22:31,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:22:31,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:22:31,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:22:31,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:22:31,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:22:31,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:22:31,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:22:31,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:22:31,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:22:31,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:22:31,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:22:31,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:22:31,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:22:31,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:22:31,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:22:31,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:22:31,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:22:31,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:22:31,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:22:31,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:22:31,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:22:31,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:22:31,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:22:31,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:22:31,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:22:31,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:22:31,715 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 23:22:31,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:22:31,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:22:31,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:22:31,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:22:31,761 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:22:31,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:22:31,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:22:31,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:22:31,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:22:31,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:22:31,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:22:31,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:22:31,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:22:31,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:22:31,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:22:31,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:22:31,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:22:31,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:22:31,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:22:31,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:22:31,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:22:31,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:31,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:22:31,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:22:31,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:22:31,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:22:31,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:22:31,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:22:31,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:22:31,768 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 23:22:32,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:22:32,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:22:32,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:22:32,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:22:32,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:22:32,080 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2020-10-13 23:22:32,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a367f00e/02077d5410ee47c7b9d81d1300f43c56/FLAG8b61a9d1d [2020-10-13 23:22:32,645 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:22:32,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2020-10-13 23:22:32,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a367f00e/02077d5410ee47c7b9d81d1300f43c56/FLAG8b61a9d1d [2020-10-13 23:22:33,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a367f00e/02077d5410ee47c7b9d81d1300f43c56 [2020-10-13 23:22:33,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:22:33,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:22:33,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:33,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:22:33,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:22:33,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a0aa91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33, skipping insertion in model container [2020-10-13 23:22:33,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:22:33,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:22:33,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:33,289 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:22:33,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:33,321 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:22:33,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33 WrapperNode [2020-10-13 23:22:33,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:33,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:22:33,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:22:33,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:22:33,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (1/1) ... [2020-10-13 23:22:33,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:22:33,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:22:33,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:22:33,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:22:33,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (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 23:22:33,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:22:33,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:22:33,524 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:22:33,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:22:33,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:22:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:22:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:22:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:22:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:22:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 23:22:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:22:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:22:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:22:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:22:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:22:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:22:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:22:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:22:33,808 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:22:33,809 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:22:33,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:33 BoogieIcfgContainer [2020-10-13 23:22:33,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:22:33,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:22:33,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:22:33,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:22:33,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:22:33" (1/3) ... [2020-10-13 23:22:33,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a7d1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:33, skipping insertion in model container [2020-10-13 23:22:33,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:33" (2/3) ... [2020-10-13 23:22:33,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a7d1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:33, skipping insertion in model container [2020-10-13 23:22:33,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:33" (3/3) ... [2020-10-13 23:22:33,826 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2020-10-13 23:22:33,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:22:33,859 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:22:33,878 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:22:33,909 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:22:33,909 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:22:33,909 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:22:33,909 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:22:33,910 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:22:33,910 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:22:33,910 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:22:33,910 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:22:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 23:22:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:22:33,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:33,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:33,942 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash -96391067, now seen corresponding path program 1 times [2020-10-13 23:22:33,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:33,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690781255] [2020-10-13 23:22:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:34,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:22:34,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:22:34,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-13 23:22:34,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:34,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:34,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:34,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:22:34,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:34,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:22:34,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:34,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:34,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:34,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:22:34,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:34,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:34,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:34,785 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 23:22:34,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690781255] [2020-10-13 23:22:34,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:34,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:22:34,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746800595] [2020-10-13 23:22:34,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:22:34,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:22:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:34,814 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 23:22:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:34,931 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-13 23:22:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:22:34,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-13 23:22:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:34,942 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:22:34,943 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:22:34,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:22:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:22:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:22:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 23:22:34,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-10-13 23:22:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:34,985 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 23:22:34,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:22:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 23:22:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:22:34,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:34,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:34,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:22:34,988 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash -974847405, now seen corresponding path program 1 times [2020-10-13 23:22:34,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:34,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713462789] [2020-10-13 23:22:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:36,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:22:36,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:22:36,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-13 23:22:36,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:36,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:36,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:36,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:36,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:22:36,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:36,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:36,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:36,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:36,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:36,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:36,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:36,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:36,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:36,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:36,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:36,111 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 23:22:36,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713462789] [2020-10-13 23:22:36,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:36,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:22:36,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294962733] [2020-10-13 23:22:36,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:22:36,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:22:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:36,115 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-13 23:22:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:36,192 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 23:22:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:22:36,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 23:22:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:36,194 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:22:36,194 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:22:36,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:22:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 23:22:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:22:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 23:22:36,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-10-13 23:22:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:36,203 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 23:22:36,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:22:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 23:22:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:22:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:36,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:36,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:22:36,205 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:36,206 INFO L82 PathProgramCache]: Analyzing trace with hash 678014577, now seen corresponding path program 1 times [2020-10-13 23:22:36,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:36,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294100013] [2020-10-13 23:22:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:36,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:38,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:22:38,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:22:38,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-13 23:22:38,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:38,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:38,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:38,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:38,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:22:38,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:38,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:38,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:38,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:38,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:38,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:22:38,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:38,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:22:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:22:38,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294100013] [2020-10-13 23:22:38,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:38,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:22:38,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814684444] [2020-10-13 23:22:38,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:22:38,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:22:38,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:22:38,135 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-13 23:22:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:38,293 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 23:22:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:22:38,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:22:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:38,294 INFO L225 Difference]: With dead ends: 39 [2020-10-13 23:22:38,294 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:22:38,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:22:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:22:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:22:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:22:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-13 23:22:38,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2020-10-13 23:22:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:38,303 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-13 23:22:38,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:22:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-13 23:22:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:22:38,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:38,305 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 23:22:38,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:22:38,305 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash 89455311, now seen corresponding path program 1 times [2020-10-13 23:22:38,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:38,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213088894] [2020-10-13 23:22:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:40,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:22:40,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:22:40,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2060 [2020-10-13 23:22:40,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:40,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:22:40,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:40,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:22:40,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:40,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:40,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:40,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:40,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:22:40,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:40,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:40,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:22:40,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213088894] [2020-10-13 23:22:40,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:40,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:22:40,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843524497] [2020-10-13 23:22:40,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:22:40,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:40,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:22:40,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:22:40,453 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-13 23:22:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:40,615 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-13 23:22:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:22:40,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 23:22:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:40,617 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:22:40,617 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:22:40,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:22:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:22:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-13 23:22:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:22:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 23:22:40,632 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-13 23:22:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:40,632 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 23:22:40,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:22:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 23:22:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:22:40,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:40,634 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] [2020-10-13 23:22:40,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:22:40,635 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1675977065, now seen corresponding path program 1 times [2020-10-13 23:22:40,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:40,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757227185] [2020-10-13 23:22:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:43,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:45,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:45,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:22:45,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:22:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:22:45,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:45,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:22:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:45,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:45,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:45,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:45,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:45,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:45,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:45,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:22:45,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757227185] [2020-10-13 23:22:45,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:45,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:22:45,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100549742] [2020-10-13 23:22:45,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:22:45,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:22:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:22:45,720 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-10-13 23:22:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:45,913 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-10-13 23:22:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:22:45,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 23:22:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:45,914 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:22:45,915 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:22:45,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:22:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:22:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 23:22:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:22:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 23:22:45,934 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2020-10-13 23:22:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:45,934 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 23:22:45,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:22:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 23:22:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:22:45,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:45,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:45,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:22:45,937 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash 850205951, now seen corresponding path program 2 times [2020-10-13 23:22:45,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:45,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599627628] [2020-10-13 23:22:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:45,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:47,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:47,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:50,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:50,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:50,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:22:50,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:22:50,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:22:50,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:50,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:50,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:22:50,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:50,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:22:50,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:52,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:52,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:52,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:22:52,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:52,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:52,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599627628] [2020-10-13 23:22:52,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:52,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:22:52,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476376894] [2020-10-13 23:22:52,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:22:52,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:22:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:22:52,671 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 26 states. [2020-10-13 23:22:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:53,937 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-13 23:22:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:22:53,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2020-10-13 23:22:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:53,940 INFO L225 Difference]: With dead ends: 73 [2020-10-13 23:22:53,940 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:22:53,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:22:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:22:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-13 23:22:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:22:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-13 23:22:53,953 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 40 [2020-10-13 23:22:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:53,953 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-13 23:22:53,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:22:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-13 23:22:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:22:53,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:53,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:53,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:22:53,955 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:53,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1075461597, now seen corresponding path program 3 times [2020-10-13 23:22:53,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:53,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789368799] [2020-10-13 23:22:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:58,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:22:58,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:22:58,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:22:58,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:58,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:58,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:22:58,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:22:58,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:22:58,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:59,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:59,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:59,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:59,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:59,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:59,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:59,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:59,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:22:59,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789368799] [2020-10-13 23:22:59,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:59,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:22:59,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500638586] [2020-10-13 23:22:59,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:22:59,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:22:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:22:59,082 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 10 states. [2020-10-13 23:22:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:59,579 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-13 23:22:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:22:59,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:22:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:59,581 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:22:59,581 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:22:59,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:22:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:22:59,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2020-10-13 23:22:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:22:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-13 23:22:59,592 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 42 [2020-10-13 23:22:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:59,593 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-13 23:22:59,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:22:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-13 23:22:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:22:59,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:59,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:59,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:22:59,595 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:59,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2017471773, now seen corresponding path program 4 times [2020-10-13 23:22:59,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:59,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230400292] [2020-10-13 23:22:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:04,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:23:04,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:04,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:23:04,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:04,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:23:04,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:04,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:04,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:04,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:04,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:04,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:04,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:04,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:04,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:04,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:04,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:23:04,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230400292] [2020-10-13 23:23:04,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:04,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:04,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017110513] [2020-10-13 23:23:04,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:04,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:04,723 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2020-10-13 23:23:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:05,020 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-10-13 23:23:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:23:05,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:23:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:05,022 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:23:05,022 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:23:05,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 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 23:23:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:23:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-13 23:23:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:23:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 23:23:05,038 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-13 23:23:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:05,038 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 23:23:05,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 23:23:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:23:05,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:05,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:05,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:23:05,041 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:05,041 INFO L82 PathProgramCache]: Analyzing trace with hash -86338283, now seen corresponding path program 5 times [2020-10-13 23:23:05,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:05,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081355097] [2020-10-13 23:23:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:06,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:06,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:07,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:07,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:10,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:23:10,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:23:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:23:10,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:10,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:23:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:23:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:11,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:11,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:11,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:11,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:11,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:11,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:11,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:11,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:11,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081355097] [2020-10-13 23:23:11,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:11,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:23:11,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855253945] [2020-10-13 23:23:11,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:23:11,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:23:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:23:11,891 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 31 states. [2020-10-13 23:23:13,032 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-13 23:23:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:14,984 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-10-13 23:23:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:23:14,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2020-10-13 23:23:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:14,986 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:23:14,986 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:23:14,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:23:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:23:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2020-10-13 23:23:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:23:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 23:23:14,999 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2020-10-13 23:23:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:14,999 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 23:23:14,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:23:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 23:23:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:23:15,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:15,001 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:15,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:23:15,001 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1334859661, now seen corresponding path program 6 times [2020-10-13 23:23:15,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:15,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651352409] [2020-10-13 23:23:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:15,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:20,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:23:20,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:20,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:23:20,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:20,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:23:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:23:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:23:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:20,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:20,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:20,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:20,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:20,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:23:20,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:20,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:23:20,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651352409] [2020-10-13 23:23:20,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:20,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:23:20,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398530853] [2020-10-13 23:23:20,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:23:20,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:23:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:20,138 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 12 states. [2020-10-13 23:23:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:20,755 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-10-13 23:23:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:23:20,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 23:23:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:20,757 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:23:20,757 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:23:20,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:23:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:23:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-13 23:23:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:23:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-13 23:23:20,774 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 52 [2020-10-13 23:23:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:20,775 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-13 23:23:20,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:23:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-13 23:23:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:23:20,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:20,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:20,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:23:20,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash -353372237, now seen corresponding path program 7 times [2020-10-13 23:23:20,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:20,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597447026] [2020-10-13 23:23:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:20,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:25,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:25,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:23:25,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:25,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:23:25,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:25,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:25,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:23:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:23:25,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:25,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:25,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:25,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:25,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:25,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:25,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:25,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:25,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:25,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:23:25,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597447026] [2020-10-13 23:23:25,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:25,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:23:25,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421520694] [2020-10-13 23:23:25,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:23:25,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:25,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:23:25,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:25,903 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2020-10-13 23:23:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:26,256 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-10-13 23:23:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:23:26,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 23:23:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:26,258 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:23:26,258 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:23:26,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 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 23:23:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:23:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-13 23:23:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:23:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-13 23:23:26,272 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-13 23:23:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:26,272 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-13 23:23:26,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:23:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-13 23:23:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:23:26,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:26,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:26,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:23:26,274 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:26,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1466685013, now seen corresponding path program 8 times [2020-10-13 23:23:26,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:26,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120362693] [2020-10-13 23:23:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:26,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:26,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:29,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:31,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:23:31,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:23:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-13 23:23:31,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:31,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:23:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:23:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:33,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:33,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:33,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:33,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:33,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:33,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:33,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:33,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:33,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120362693] [2020-10-13 23:23:33,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:33,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:23:33,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418558637] [2020-10-13 23:23:33,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:23:33,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:23:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1741, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:23:33,842 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 44 states. [2020-10-13 23:23:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:36,233 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2020-10-13 23:23:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:23:36,234 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 60 [2020-10-13 23:23:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:36,236 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:23:36,236 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:23:36,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:23:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:23:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-10-13 23:23:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:23:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-13 23:23:36,251 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 60 [2020-10-13 23:23:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:36,251 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-13 23:23:36,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:23:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-13 23:23:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:23:36,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:36,253 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:36,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:23:36,253 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1863053431, now seen corresponding path program 9 times [2020-10-13 23:23:36,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:36,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505646120] [2020-10-13 23:23:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:36,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:41,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:23:41,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:23:41,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:41,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:41,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:41,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:41,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:41,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:41,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:41,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:41,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:41,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:41,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:23:41,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505646120] [2020-10-13 23:23:41,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:41,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:23:41,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118886596] [2020-10-13 23:23:41,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:23:41,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:41,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:23:41,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:41,379 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 14 states. [2020-10-13 23:23:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:42,020 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2020-10-13 23:23:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:23:42,020 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 23:23:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:42,022 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:23:42,022 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 23:23:42,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:23:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 23:23:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-13 23:23:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:23:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-13 23:23:42,035 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 62 [2020-10-13 23:23:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:42,036 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-13 23:23:42,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:23:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-13 23:23:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:23:42,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:42,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:42,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:23:42,037 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash 278314697, now seen corresponding path program 10 times [2020-10-13 23:23:42,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:42,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112382845] [2020-10-13 23:23:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:23:47,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:23:47,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:23:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:23:47,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:47,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:47,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:47,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:47,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:23:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:23:47,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112382845] [2020-10-13 23:23:47,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:47,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:23:47,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56437818] [2020-10-13 23:23:47,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:23:47,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:47,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:23:47,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:47,260 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 14 states. [2020-10-13 23:23:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:47,854 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-13 23:23:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:23:47,855 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 23:23:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:47,856 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:23:47,856 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:23:47,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:23:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:23:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-10-13 23:23:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:23:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-13 23:23:47,886 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-13 23:23:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:47,887 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-13 23:23:47,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:23:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-13 23:23:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:23:47,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:47,891 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:47,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:23:47,892 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash 25705153, now seen corresponding path program 11 times [2020-10-13 23:23:47,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:47,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852293437] [2020-10-13 23:23:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:47,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:50,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 23:23:52,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:52,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:23:52,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:56,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:56,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:56,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:56,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:56,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:56,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:56,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:56,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:56,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:23:56,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852293437] [2020-10-13 23:23:56,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:56,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:23:56,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781575092] [2020-10-13 23:23:56,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:23:56,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:23:56,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1886, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:23:56,723 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 45 states. [2020-10-13 23:23:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:59,100 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-10-13 23:23:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:23:59,100 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 70 [2020-10-13 23:23:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:59,101 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:23:59,101 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:23:59,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=104, Invalid=2058, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:23:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:23:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-10-13 23:23:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:23:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-13 23:23:59,127 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2020-10-13 23:23:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:59,128 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-13 23:23:59,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:23:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-13 23:23:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:23:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:59,133 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:59,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:23:59,133 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1363006239, now seen corresponding path program 12 times [2020-10-13 23:23:59,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:59,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980868849] [2020-10-13 23:23:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:59,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:04,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:04,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:24:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:04,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:04,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:04,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:04,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:04,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:04,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:04,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:04,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 23:24:04,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980868849] [2020-10-13 23:24:04,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:04,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:24:04,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129962396] [2020-10-13 23:24:04,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:24:04,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:24:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:24:04,348 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 16 states. [2020-10-13 23:24:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:05,717 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2020-10-13 23:24:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:24:05,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 23:24:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:05,720 INFO L225 Difference]: With dead ends: 187 [2020-10-13 23:24:05,720 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:24:05,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:24:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:24:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2020-10-13 23:24:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:24:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2020-10-13 23:24:05,741 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 72 [2020-10-13 23:24:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:05,743 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2020-10-13 23:24:05,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:24:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2020-10-13 23:24:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:24:05,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:05,745 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:05,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:24:05,746 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:05,746 INFO L82 PathProgramCache]: Analyzing trace with hash -53812641, now seen corresponding path program 13 times [2020-10-13 23:24:05,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:05,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108921623] [2020-10-13 23:24:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:10,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:10,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:24:10,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:24:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:24:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:10,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:24:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:24:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:10,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:10,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:10,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:10,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:10,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:10,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:10,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:10,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:10,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:10,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 23:24:10,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108921623] [2020-10-13 23:24:10,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:10,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:24:10,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782056066] [2020-10-13 23:24:10,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:24:10,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:24:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:24:10,938 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand 16 states. [2020-10-13 23:24:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:11,601 INFO L93 Difference]: Finished difference Result 183 states and 194 transitions. [2020-10-13 23:24:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:24:11,601 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 23:24:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:11,602 INFO L225 Difference]: With dead ends: 183 [2020-10-13 23:24:11,602 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:24:11,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:24:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:24:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-10-13 23:24:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:24:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-13 23:24:11,622 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-13 23:24:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:11,622 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-13 23:24:11,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:24:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-13 23:24:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:24:11,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:11,624 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:11,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:24:11,624 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash -621991849, now seen corresponding path program 14 times [2020-10-13 23:24:11,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:11,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585410182] [2020-10-13 23:24:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:11,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:13,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:16,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:24:16,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:24:16,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:24:16,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:16,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 23:24:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:24:16,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:20,096 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 23:24:20,356 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 23:24:20,581 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-13 23:24:20,799 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-13 23:24:24,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:24,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:24,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:24,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:24,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:24,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:24,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:24,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:24,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:24,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:24,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:24:24,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585410182] [2020-10-13 23:24:24,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:24,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 23:24:24,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937529525] [2020-10-13 23:24:24,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 23:24:24,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:24,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 23:24:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3423, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 23:24:24,168 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 62 states. [2020-10-13 23:24:25,069 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-13 23:24:26,124 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-13 23:24:26,450 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-13 23:24:26,848 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-13 23:24:27,396 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-13 23:24:27,888 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-13 23:24:28,384 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-13 23:24:28,714 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-13 23:24:29,508 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-13 23:24:29,849 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-13 23:24:30,085 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-13 23:24:30,613 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-13 23:24:31,019 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-13 23:24:31,425 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-13 23:24:32,007 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-13 23:24:32,608 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-13 23:24:33,231 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-13 23:24:33,591 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-13 23:24:35,106 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-13 23:24:35,478 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-13 23:24:36,138 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-13 23:24:36,593 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 23:24:36,923 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2020-10-13 23:24:37,287 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-13 23:24:37,755 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-13 23:24:38,146 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 23:24:38,519 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-13 23:24:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:39,566 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2020-10-13 23:24:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-13 23:24:39,567 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-10-13 23:24:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:39,569 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:24:39,569 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:24:39,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=1131, Invalid=9999, Unknown=0, NotChecked=0, Total=11130 [2020-10-13 23:24:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:24:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-10-13 23:24:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:24:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-10-13 23:24:39,586 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2020-10-13 23:24:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:39,586 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-10-13 23:24:39,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 23:24:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-10-13 23:24:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:24:39,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:39,587 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:39,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:24:39,588 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash 778785589, now seen corresponding path program 15 times [2020-10-13 23:24:39,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:39,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602679063] [2020-10-13 23:24:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:44,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:24:44,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:44,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:24:44,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:44,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:44,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:24:44,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:24:44,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:24:44,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:44,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:44,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:44,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:44,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:44,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:44,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:44,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:44,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 23:24:45,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602679063] [2020-10-13 23:24:45,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:45,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:24:45,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511649484] [2020-10-13 23:24:45,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:24:45,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:24:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:24:45,012 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 18 states. [2020-10-13 23:24:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:46,724 INFO L93 Difference]: Finished difference Result 180 states and 193 transitions. [2020-10-13 23:24:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:24:46,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-13 23:24:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:46,727 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:24:46,728 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:24:46,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:24:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:24:46,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 106. [2020-10-13 23:24:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:24:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-13 23:24:46,745 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 82 [2020-10-13 23:24:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:46,745 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-13 23:24:46,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:24:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-13 23:24:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:24:46,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:46,746 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:46,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:24:46,746 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1909775699, now seen corresponding path program 16 times [2020-10-13 23:24:46,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:46,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495226030] [2020-10-13 23:24:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:46,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:46,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:51,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:24:51,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:51,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:24:51,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:51,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:51,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:24:51,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:51,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:24:51,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:52,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:52,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:52,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:52,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:52,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:24:52,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495226030] [2020-10-13 23:24:52,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:52,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:24:52,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26096505] [2020-10-13 23:24:52,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:24:52,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:52,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:24:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:24:52,041 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 18 states. [2020-10-13 23:24:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:52,877 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-10-13 23:24:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:24:52,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-13 23:24:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:52,880 INFO L225 Difference]: With dead ends: 193 [2020-10-13 23:24:52,880 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:24:52,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:24:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:24:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-13 23:24:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:24:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-13 23:24:52,895 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2020-10-13 23:24:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:52,895 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-13 23:24:52,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:24:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-13 23:24:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:24:52,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:52,896 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:52,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:24:52,897 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash -813608339, now seen corresponding path program 17 times [2020-10-13 23:24:52,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:52,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697667832] [2020-10-13 23:24:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:57,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:24:57,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:57,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:24:57,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:57,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 23:24:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 23:24:57,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:59,876 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-13 23:25:00,071 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-13 23:25:00,325 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-13 23:25:00,632 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-13 23:25:00,920 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-13 23:25:01,203 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-13 23:25:01,484 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-13 23:25:01,718 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-13 23:25:01,981 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-13 23:25:02,257 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-13 23:25:02,510 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-13 23:25:02,776 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 23:25:03,079 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 23:25:03,408 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-13 23:25:03,718 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-13 23:25:04,026 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-13 23:25:04,381 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-13 23:25:04,757 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-13 23:25:05,120 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 23:25:05,500 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-13 23:25:05,821 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-13 23:25:06,091 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 23:25:06,385 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 23:25:11,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:11,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:11,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:11,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:11,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:11,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:11,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:25:11,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697667832] [2020-10-13 23:25:11,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:11,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 23:25:11,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598891207] [2020-10-13 23:25:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 23:25:11,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 23:25:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:25:11,195 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 71 states. [2020-10-13 23:25:11,698 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 3 [2020-10-13 23:25:12,344 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 18 [2020-10-13 23:25:13,289 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-13 23:25:15,275 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-13 23:25:15,712 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-13 23:25:16,230 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-13 23:25:16,597 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 23:25:17,177 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-13 23:25:17,547 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 23:25:18,003 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-13 23:25:18,545 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 23:25:19,019 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-13 23:25:21,160 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-13 23:25:21,625 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-13 23:25:25,002 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-13 23:25:25,580 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2020-10-13 23:25:27,802 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 23:25:29,019 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 23:25:29,653 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 23:25:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:33,663 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2020-10-13 23:25:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-13 23:25:33,665 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 90 [2020-10-13 23:25:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:33,667 INFO L225 Difference]: With dead ends: 167 [2020-10-13 23:25:33,668 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:25:33,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=712, Invalid=11498, Unknown=0, NotChecked=0, Total=12210 [2020-10-13 23:25:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:25:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2020-10-13 23:25:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 23:25:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-13 23:25:33,691 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 90 [2020-10-13 23:25:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:33,692 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-13 23:25:33,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 23:25:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-13 23:25:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:25:33,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:33,693 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:33,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:25:33,694 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1763897291, now seen corresponding path program 18 times [2020-10-13 23:25:33,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:33,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686446792] [2020-10-13 23:25:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:38,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:25:38,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:38,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:25:38,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:38,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:25:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:25:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:25:38,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:39,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:39,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:39,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:25:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686446792] [2020-10-13 23:25:39,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:39,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:25:39,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377571787] [2020-10-13 23:25:39,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:25:39,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:25:39,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:25:39,328 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 20 states. [2020-10-13 23:25:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:43,150 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2020-10-13 23:25:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:25:43,158 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 23:25:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:43,163 INFO L225 Difference]: With dead ends: 236 [2020-10-13 23:25:43,164 INFO L226 Difference]: Without dead ends: 183 [2020-10-13 23:25:43,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:25:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-13 23:25:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 134. [2020-10-13 23:25:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:25:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2020-10-13 23:25:43,200 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 92 [2020-10-13 23:25:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:43,200 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2020-10-13 23:25:43,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:25:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2020-10-13 23:25:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:25:43,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:43,202 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:43,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:25:43,202 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash 819773195, now seen corresponding path program 19 times [2020-10-13 23:25:43,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:43,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741582828] [2020-10-13 23:25:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:48,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:25:48,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:25:48,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:48,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:48,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:48,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:48,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:48,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:25:48,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741582828] [2020-10-13 23:25:48,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:48,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:25:48,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930438751] [2020-10-13 23:25:48,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:25:48,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:48,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:25:48,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:25:48,775 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand 20 states. [2020-10-13 23:25:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:50,893 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2020-10-13 23:25:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:25:50,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 23:25:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:50,898 INFO L225 Difference]: With dead ends: 231 [2020-10-13 23:25:50,898 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:25:50,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:25:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:25:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2020-10-13 23:25:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:25:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-13 23:25:50,917 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-13 23:25:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:50,917 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-13 23:25:50,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:25:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-13 23:25:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:25:50,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:50,918 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:50,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:25:50,918 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1972050179, now seen corresponding path program 20 times [2020-10-13 23:25:50,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:50,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421077293] [2020-10-13 23:25:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:56,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:56,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:25:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:25:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:56,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 23:25:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:25:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:25:56,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:01,890 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-13 23:26:02,784 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 23:26:03,318 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-13 23:26:03,806 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-13 23:26:04,314 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-13 23:26:07,319 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-13 23:26:07,875 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-13 23:26:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:18,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:18,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:18,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:18,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:18,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:18,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:18,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:18,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:18,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:18,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:26:18,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421077293] [2020-10-13 23:26:18,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:18,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 23:26:18,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891086121] [2020-10-13 23:26:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 23:26:18,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 23:26:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=4683, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 23:26:18,638 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 70 states.