/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/eca-rers2012/Problem04_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 19:23:26,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 19:23:26,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 19:23:26,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 19:23:26,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 19:23:26,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 19:23:26,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 19:23:26,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 19:23:26,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 19:23:26,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 19:23:26,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 19:23:26,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 19:23:26,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 19:23:26,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 19:23:26,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 19:23:26,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 19:23:26,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 19:23:26,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 19:23:26,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 19:23:26,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 19:23:26,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 19:23:26,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 19:23:26,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 19:23:26,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 19:23:26,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 19:23:26,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 19:23:26,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 19:23:26,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 19:23:26,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 19:23:26,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 19:23:26,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 19:23:26,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 19:23:26,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 19:23:26,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 19:23:26,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 19:23:26,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 19:23:26,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 19:23:26,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 19:23:26,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 19:23:26,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 19:23:26,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 19:23:26,776 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 [2020-10-14 19:23:26,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 19:23:26,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 19:23:26,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 19:23:26,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 19:23:26,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 19:23:26,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 19:23:26,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 19:23:26,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 19:23:26,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 19:23:26,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 19:23:26,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 19:23:26,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 19:23:26,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 19:23:26,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 19:23:26,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 19:23:26,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 19:23:26,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 19:23:26,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 19:23:26,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 19:23:26,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 19:23:26,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 19:23:26,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 19:23:26,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 19:23:26,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 19:23:26,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 19:23:26,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 19:23:26,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 19:23:26,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 19:23:26,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 19:23:26,829 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 19:23:27,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 19:23:27,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 19:23:27,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 19:23:27,170 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 19:23:27,172 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 19:23:27,173 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label20.c [2020-10-14 19:23:27,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0997c0af2/975ce1311e764aa2a40c55ad5c6d732a/FLAG5271f0808 [2020-10-14 19:23:28,042 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 19:23:28,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label20.c [2020-10-14 19:23:28,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0997c0af2/975ce1311e764aa2a40c55ad5c6d732a/FLAG5271f0808 [2020-10-14 19:23:28,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0997c0af2/975ce1311e764aa2a40c55ad5c6d732a [2020-10-14 19:23:28,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 19:23:28,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 19:23:28,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 19:23:28,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 19:23:28,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 19:23:28,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:23:28" (1/1) ... [2020-10-14 19:23:28,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7decd891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:28, skipping insertion in model container [2020-10-14 19:23:28,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:23:28" (1/1) ... [2020-10-14 19:23:28,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 19:23:28,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 19:23:29,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 19:23:29,851 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 19:23:30,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 19:23:30,599 INFO L208 MainTranslator]: Completed translation [2020-10-14 19:23:30,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30 WrapperNode [2020-10-14 19:23:30,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 19:23:30,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 19:23:30,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 19:23:30,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 19:23:30,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (1/1) ... [2020-10-14 19:23:30,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 19:23:30,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 19:23:30,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 19:23:30,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 19:23:30,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (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 [2020-10-14 19:23:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 19:23:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 19:23:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 19:23:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 19:23:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 19:23:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 19:23:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 19:23:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 19:23:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 19:23:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 19:23:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 19:23:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 19:23:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 19:23:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 19:23:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 19:23:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 19:23:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 19:23:35,637 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 19:23:35,638 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 19:23:35,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:35 BoogieIcfgContainer [2020-10-14 19:23:35,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 19:23:35,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 19:23:35,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 19:23:35,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 19:23:35,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:23:28" (1/3) ... [2020-10-14 19:23:35,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abd07ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:35, skipping insertion in model container [2020-10-14 19:23:35,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:30" (2/3) ... [2020-10-14 19:23:35,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abd07ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:35, skipping insertion in model container [2020-10-14 19:23:35,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:35" (3/3) ... [2020-10-14 19:23:35,670 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label20.c [2020-10-14 19:23:35,681 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 19:23:35,695 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 19:23:35,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 19:23:35,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 19:23:35,744 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 19:23:35,745 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 19:23:35,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 19:23:35,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 19:23:35,745 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 19:23:35,745 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 19:23:35,745 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 19:23:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2020-10-14 19:23:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-10-14 19:23:35,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:23:35,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-14 19:23:35,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:23:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:23:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2009455858, now seen corresponding path program 1 times [2020-10-14 19:23:35,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:23:35,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771745472] [2020-10-14 19:23:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:23:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:36,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:41,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:41,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 819 [2020-10-14 19:23:41,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 19:23:41,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-14 19:23:41,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:41,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 19:23:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 19:23:41,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 813 [2020-10-14 19:23:41,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 19:23:42,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:23:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:42,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:42,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:23:42,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:23:42,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:23:42,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 19:23:42,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:23:42,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:23:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:23:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:23:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 19:23:42,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:23:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:23:43,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771745472] [2020-10-14 19:23:43,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 19:23:43,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 19:23:43,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861433731] [2020-10-14 19:23:43,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:23:43,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:23:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:23:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:23:43,087 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 5 states. [2020-10-14 19:23:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:23:55,095 INFO L93 Difference]: Finished difference Result 3521 states and 6821 transitions. [2020-10-14 19:23:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 19:23:55,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 805 [2020-10-14 19:23:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:23:55,157 INFO L225 Difference]: With dead ends: 3521 [2020-10-14 19:23:55,157 INFO L226 Difference]: Without dead ends: 2547 [2020-10-14 19:23:55,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 19:23:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2020-10-14 19:23:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2543. [2020-10-14 19:23:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2543 states. [2020-10-14 19:23:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 4203 transitions. [2020-10-14 19:23:55,379 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 4203 transitions. Word has length 805 [2020-10-14 19:23:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:23:55,384 INFO L479 AbstractCegarLoop]: Abstraction has 2543 states and 4203 transitions. [2020-10-14 19:23:55,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:23:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 4203 transitions. [2020-10-14 19:23:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2020-10-14 19:23:55,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:23:55,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:23:55,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 19:23:55,415 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:23:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:23:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash 316211825, now seen corresponding path program 1 times [2020-10-14 19:23:55,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:23:55,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992829117] [2020-10-14 19:23:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:23:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:23:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:23:59,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:00,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 832 [2020-10-14 19:24:00,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:24:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-14 19:24:00,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:00,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:24:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 19:24:00,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 810 [2020-10-14 19:24:00,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 19:24:01,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:24:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:01,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:01,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:01,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:24:01,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:01,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 19:24:01,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:01,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:01,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:01,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:01,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:24:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:01,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:01,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:01,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 19:24:01,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:01,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 19:24:01,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:01,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:01,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:24:01,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 19:24:01,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:24:01,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992829117] [2020-10-14 19:24:01,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:24:01,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:24:01,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391041195] [2020-10-14 19:24:01,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:24:01,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:24:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:24:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:24:01,963 INFO L87 Difference]: Start difference. First operand 2543 states and 4203 transitions. Second operand 5 states. [2020-10-14 19:24:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:24:09,578 INFO L93 Difference]: Finished difference Result 7621 states and 12735 transitions. [2020-10-14 19:24:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:24:09,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 816 [2020-10-14 19:24:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:24:09,612 INFO L225 Difference]: With dead ends: 7621 [2020-10-14 19:24:09,612 INFO L226 Difference]: Without dead ends: 5084 [2020-10-14 19:24:09,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 19:24:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2020-10-14 19:24:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 5080. [2020-10-14 19:24:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5080 states. [2020-10-14 19:24:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 7496 transitions. [2020-10-14 19:24:09,820 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 7496 transitions. Word has length 816 [2020-10-14 19:24:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:24:09,821 INFO L479 AbstractCegarLoop]: Abstraction has 5080 states and 7496 transitions. [2020-10-14 19:24:09,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:24:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 7496 transitions. [2020-10-14 19:24:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2020-10-14 19:24:09,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:24:09,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:24:09,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 19:24:09,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:24:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:24:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1363694383, now seen corresponding path program 1 times [2020-10-14 19:24:09,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:24:09,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462949894] [2020-10-14 19:24:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:24:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:10,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:11,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:12,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:15,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:15,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 883 [2020-10-14 19:24:15,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:24:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-14 19:24:15,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:15,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:24:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 19:24:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 810 [2020-10-14 19:24:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:24:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:15,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:15,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:15,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:24:15,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:24:15,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:15,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:15,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:15,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:24:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:15,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:15,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:15,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 19:24:15,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:15,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-14 19:24:15,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:15,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:24:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 19:24:15,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:24:17,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462949894] [2020-10-14 19:24:17,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:24:17,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:24:17,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283891474] [2020-10-14 19:24:17,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:24:17,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:24:17,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:24:17,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:24:17,050 INFO L87 Difference]: Start difference. First operand 5080 states and 7496 transitions. Second operand 5 states. [2020-10-14 19:24:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:24:25,603 INFO L93 Difference]: Finished difference Result 12690 states and 19404 transitions. [2020-10-14 19:24:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:24:25,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 867 [2020-10-14 19:24:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:24:25,643 INFO L225 Difference]: With dead ends: 12690 [2020-10-14 19:24:25,643 INFO L226 Difference]: Without dead ends: 7616 [2020-10-14 19:24:25,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 19:24:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2020-10-14 19:24:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7612. [2020-10-14 19:24:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7612 states. [2020-10-14 19:24:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 10705 transitions. [2020-10-14 19:24:25,828 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 10705 transitions. Word has length 867 [2020-10-14 19:24:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:24:25,830 INFO L479 AbstractCegarLoop]: Abstraction has 7612 states and 10705 transitions. [2020-10-14 19:24:25,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:24:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 10705 transitions. [2020-10-14 19:24:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2020-10-14 19:24:25,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:24:25,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:24:25,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 19:24:25,865 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:24:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:24:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1617728934, now seen corresponding path program 1 times [2020-10-14 19:24:25,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:24:25,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960695231] [2020-10-14 19:24:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:24:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:25,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:29,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:30,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:31,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 918 [2020-10-14 19:24:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 19:24:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 19:24:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:31,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:24:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-14 19:24:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 810 [2020-10-14 19:24:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:31,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:24:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:31,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:31,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:31,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:24:31,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 19:24:31,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:31,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:31,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:31,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:31,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:24:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:31,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:31,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 19:24:31,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:31,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 19:24:31,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:31,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:31,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:31,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:31,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 19:24:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:31,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:31,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:31,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 19:24:31,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-14 19:24:31,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:31,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:24:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 19:24:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 19:24:32,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960695231] [2020-10-14 19:24:32,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:24:32,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:24:32,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539936877] [2020-10-14 19:24:32,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:24:32,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:24:32,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:24:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:24:32,437 INFO L87 Difference]: Start difference. First operand 7612 states and 10705 transitions. Second operand 5 states. [2020-10-14 19:24:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:24:42,184 INFO L93 Difference]: Finished difference Result 22818 states and 32576 transitions. [2020-10-14 19:24:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:24:42,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 900 [2020-10-14 19:24:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:24:42,250 INFO L225 Difference]: With dead ends: 22818 [2020-10-14 19:24:42,250 INFO L226 Difference]: Without dead ends: 15212 [2020-10-14 19:24:42,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 19:24:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15212 states. [2020-10-14 19:24:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15212 to 15208. [2020-10-14 19:24:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15208 states. [2020-10-14 19:24:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15208 states to 15208 states and 19896 transitions. [2020-10-14 19:24:42,587 INFO L78 Accepts]: Start accepts. Automaton has 15208 states and 19896 transitions. Word has length 900 [2020-10-14 19:24:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:24:42,588 INFO L479 AbstractCegarLoop]: Abstraction has 15208 states and 19896 transitions. [2020-10-14 19:24:42,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:24:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15208 states and 19896 transitions. [2020-10-14 19:24:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 931 [2020-10-14 19:24:42,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:24:42,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:24:42,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 19:24:42,643 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:24:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:24:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 921486229, now seen corresponding path program 1 times [2020-10-14 19:24:42,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:24:42,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690804732] [2020-10-14 19:24:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:24:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:43,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:47,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:47,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 946 [2020-10-14 19:24:47,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 19:24:47,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-14 19:24:47,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:47,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 19:24:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-14 19:24:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 713 [2020-10-14 19:24:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:24:51,968 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-14 19:24:52,146 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-14 19:24:52,360 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-10-14 19:24:52,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:24:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:52,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:52,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:52,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:24:52,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:52,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 19:24:52,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:52,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:24:52,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:52,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:24:52,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:24:52,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:24:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:24:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:24:52,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:24:52,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 19:24:52,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:24:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-14 19:24:52,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:24:52,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:24:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:24:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:24:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 19:24:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 19:24:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:24:57,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690804732] [2020-10-14 19:24:57,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:24:57,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 19:24:57,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430810472] [2020-10-14 19:24:57,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 19:24:57,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:24:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 19:24:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-14 19:24:57,857 INFO L87 Difference]: Start difference. First operand 15208 states and 19896 transitions. Second operand 20 states. [2020-10-14 19:24:59,072 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 19:24:59,270 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 19:25:02,245 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-14 19:25:04,029 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-14 19:25:04,706 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-14 19:25:04,958 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-14 19:25:07,642 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-14 19:25:09,031 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-14 19:25:10,557 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 19:25:10,792 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-14 19:25:11,246 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-14 19:25:15,549 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 19:25:15,735 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-14 19:25:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:25:16,446 INFO L93 Difference]: Finished difference Result 31118 states and 41293 transitions. [2020-10-14 19:25:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 19:25:16,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 930 [2020-10-14 19:25:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:25:16,496 INFO L225 Difference]: With dead ends: 31118 [2020-10-14 19:25:16,496 INFO L226 Difference]: Without dead ends: 15916 [2020-10-14 19:25:16,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 19:25:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2020-10-14 19:25:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 15912. [2020-10-14 19:25:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15912 states. [2020-10-14 19:25:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15912 states to 15912 states and 20617 transitions. [2020-10-14 19:25:16,831 INFO L78 Accepts]: Start accepts. Automaton has 15912 states and 20617 transitions. Word has length 930 [2020-10-14 19:25:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:25:16,832 INFO L479 AbstractCegarLoop]: Abstraction has 15912 states and 20617 transitions. [2020-10-14 19:25:16,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 19:25:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 15912 states and 20617 transitions. [2020-10-14 19:25:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2020-10-14 19:25:16,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:25:16,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:25:16,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 19:25:16,891 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:25:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:25:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash -692429168, now seen corresponding path program 1 times [2020-10-14 19:25:16,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:25:16,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885212729] [2020-10-14 19:25:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:25:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:17,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:17,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:21,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:22,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:22,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1061 [2020-10-14 19:25:22,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 19:25:22,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-14 19:25:22,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:22,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:25:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 250 [2020-10-14 19:25:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 810 [2020-10-14 19:25:22,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:22,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:25:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:22,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:22,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:22,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:25:22,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:22,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 19:25:22,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:22,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:25:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:25:22,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:25:22,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:25:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:22,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:22,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:22,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 19:25:22,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:22,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 19:25:22,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:22,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:25:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:25:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:25:22,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-14 19:25:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:22,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:22,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:22,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-14 19:25:22,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:22,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 19:25:22,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:22,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:25:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:22,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-14 19:25:22,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:25:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-10-14 19:25:24,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885212729] [2020-10-14 19:25:24,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:25:24,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 19:25:24,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948024305] [2020-10-14 19:25:24,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 19:25:24,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:25:24,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 19:25:24,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 19:25:24,121 INFO L87 Difference]: Start difference. First operand 15912 states and 20617 transitions. Second operand 6 states. [2020-10-14 19:25:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:25:37,627 INFO L93 Difference]: Finished difference Result 58781 states and 78532 transitions. [2020-10-14 19:25:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 19:25:37,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1043 [2020-10-14 19:25:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:25:37,800 INFO L225 Difference]: With dead ends: 58781 [2020-10-14 19:25:37,800 INFO L226 Difference]: Without dead ends: 42875 [2020-10-14 19:25:37,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 19:25:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42875 states. [2020-10-14 19:25:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42875 to 42871. [2020-10-14 19:25:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42871 states. [2020-10-14 19:25:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42871 states to 42871 states and 52995 transitions. [2020-10-14 19:25:38,702 INFO L78 Accepts]: Start accepts. Automaton has 42871 states and 52995 transitions. Word has length 1043 [2020-10-14 19:25:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:25:38,703 INFO L479 AbstractCegarLoop]: Abstraction has 42871 states and 52995 transitions. [2020-10-14 19:25:38,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 19:25:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42871 states and 52995 transitions. [2020-10-14 19:25:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1065 [2020-10-14 19:25:38,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:25:38,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:25:38,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 19:25:38,813 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:25:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:25:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash -145414621, now seen corresponding path program 1 times [2020-10-14 19:25:38,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:25:38,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144438151] [2020-10-14 19:25:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:25:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:38,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:39,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:44,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1084 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5217 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-14 19:25:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:44,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:25:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:44,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:25:44,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:44,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:25:44,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:44,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:25:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:25:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:44,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:25:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:44,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:44,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 19:25:44,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 19:25:44,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:44,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:25:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:25:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 19:25:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:25:44,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 19:25:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:44,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:44,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 19:25:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 19:25:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:44,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-14 19:25:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:25:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:25:44,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:25:44,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 19:25:44,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:25:44,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 19:25:44,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:25:44,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:25:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 19:25:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 19:25:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 19:25:44,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:25:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 278 proven. 77 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 19:25:45,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144438151] [2020-10-14 19:25:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:25:45,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 19:25:45,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819350337] [2020-10-14 19:25:45,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 19:25:45,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:25:45,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 19:25:45,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 19:25:45,240 INFO L87 Difference]: Start difference. First operand 42871 states and 52995 transitions. Second operand 9 states. [2020-10-14 19:26:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:26:01,686 INFO L93 Difference]: Finished difference Result 120629 states and 153351 transitions. [2020-10-14 19:26:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 19:26:01,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1064 [2020-10-14 19:26:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:26:01,991 INFO L225 Difference]: With dead ends: 120629 [2020-10-14 19:26:01,991 INFO L226 Difference]: Without dead ends: 77764 [2020-10-14 19:26:02,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-14 19:26:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77764 states. [2020-10-14 19:26:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77764 to 72612. [2020-10-14 19:26:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72612 states. [2020-10-14 19:26:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72612 states to 72612 states and 88308 transitions. [2020-10-14 19:26:05,144 INFO L78 Accepts]: Start accepts. Automaton has 72612 states and 88308 transitions. Word has length 1064 [2020-10-14 19:26:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:26:05,144 INFO L479 AbstractCegarLoop]: Abstraction has 72612 states and 88308 transitions. [2020-10-14 19:26:05,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 19:26:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 72612 states and 88308 transitions. [2020-10-14 19:26:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-10-14 19:26:05,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:26:05,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:26:05,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 19:26:05,416 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:26:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:26:05,416 INFO L82 PathProgramCache]: Analyzing trace with hash 949956455, now seen corresponding path program 1 times [2020-10-14 19:26:05,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:26:05,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212434376] [2020-10-14 19:26:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:26:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:05,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:06,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:10,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:10,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1086 [2020-10-14 19:26:10,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:26:10,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 19:26:10,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:10,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:10,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 19:26:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-14 19:26:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-14 19:26:10,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:26:10,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:26:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:10,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:10,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:26:10,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:10,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 19:26:10,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:10,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:26:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:26:10,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:26:10,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:26:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:10,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:10,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 19:26:10,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:10,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 19:26:10,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:10,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:10,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:26:10,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:10,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:26:10,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:26:10,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 19:26:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:10,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:10,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:10,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 19:26:10,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:10,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 19:26:10,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:10,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:10,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:10,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 19:26:10,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:26:10,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-14 19:26:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:11,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:11,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:11,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 19:26:11,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:11,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-14 19:26:11,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:11,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:11,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 19:26:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 19:26:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 19:26:11,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:26:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 19:26:11,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212434376] [2020-10-14 19:26:11,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:26:11,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 19:26:11,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497464076] [2020-10-14 19:26:11,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 19:26:11,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:26:11,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 19:26:11,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 19:26:11,941 INFO L87 Difference]: Start difference. First operand 72612 states and 88308 transitions. Second operand 8 states. [2020-10-14 19:26:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:26:27,978 INFO L93 Difference]: Finished difference Result 145922 states and 181501 transitions. [2020-10-14 19:26:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 19:26:27,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1066 [2020-10-14 19:26:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:26:28,257 INFO L225 Difference]: With dead ends: 145922 [2020-10-14 19:26:28,258 INFO L226 Difference]: Without dead ends: 73316 [2020-10-14 19:26:28,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-14 19:26:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73316 states. [2020-10-14 19:26:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73316 to 72752. [2020-10-14 19:26:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72752 states. [2020-10-14 19:26:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72752 states to 72752 states and 83172 transitions. [2020-10-14 19:26:30,248 INFO L78 Accepts]: Start accepts. Automaton has 72752 states and 83172 transitions. Word has length 1066 [2020-10-14 19:26:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:26:30,249 INFO L479 AbstractCegarLoop]: Abstraction has 72752 states and 83172 transitions. [2020-10-14 19:26:30,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 19:26:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 72752 states and 83172 transitions. [2020-10-14 19:26:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2020-10-14 19:26:30,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:26:30,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:26:30,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 19:26:30,414 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:26:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:26:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash 686300445, now seen corresponding path program 1 times [2020-10-14 19:26:30,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:26:30,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146737436] [2020-10-14 19:26:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:26:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:31,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:31,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:35,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:35,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1111 [2020-10-14 19:26:35,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 19:26:35,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 19:26:35,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:35,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 19:26:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 297 [2020-10-14 19:26:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 813 [2020-10-14 19:26:35,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:36,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:26:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:36,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:36,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:36,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:26:36,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:36,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 19:26:36,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:36,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 19:26:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 19:26:36,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 19:26:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:26:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:36,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:36,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-14 19:26:36,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:36,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-14 19:26:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:36,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:36,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 19:26:36,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-14 19:26:36,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:36,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 19:26:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 19:26:37,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146737436] [2020-10-14 19:26:37,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:26:37,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:26:37,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910357075] [2020-10-14 19:26:37,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:26:37,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:26:37,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:26:37,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:26:37,638 INFO L87 Difference]: Start difference. First operand 72752 states and 83172 transitions. Second operand 5 states. [2020-10-14 19:26:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 19:26:48,261 INFO L93 Difference]: Finished difference Result 175031 states and 201067 transitions. [2020-10-14 19:26:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 19:26:48,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1093 [2020-10-14 19:26:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 19:26:48,276 INFO L225 Difference]: With dead ends: 175031 [2020-10-14 19:26:48,276 INFO L226 Difference]: Without dead ends: 5891 [2020-10-14 19:26:48,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 19:26:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2020-10-14 19:26:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 2537. [2020-10-14 19:26:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2537 states. [2020-10-14 19:26:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 2553 transitions. [2020-10-14 19:26:48,489 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 2553 transitions. Word has length 1093 [2020-10-14 19:26:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 19:26:48,490 INFO L479 AbstractCegarLoop]: Abstraction has 2537 states and 2553 transitions. [2020-10-14 19:26:48,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 19:26:48,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 2553 transitions. [2020-10-14 19:26:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1248 [2020-10-14 19:26:48,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 19:26:48,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 19:26:48,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 19:26:48,508 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 19:26:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 19:26:48,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1719054615, now seen corresponding path program 1 times [2020-10-14 19:26:48,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 19:26:48,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812219895] [2020-10-14 19:26:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 19:26:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:48,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:53,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:53,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1265 [2020-10-14 19:26:53,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 19:26:53,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-14 19:26:53,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:53,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 19:26:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 19:26:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1259 [2020-10-14 19:26:53,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:54,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 19:26:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:54,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:54,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:54,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 19:26:54,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:54,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 19:26:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:54,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:54,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:55,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 445 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:55,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 436 [2020-10-14 19:26:55,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:55,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-14 19:26:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 19:26:55,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 19:26:56,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 19:26:56,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-14 19:26:56,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 19:26:56,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1489 [2020-10-14 19:26:56,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 19:26:56,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 19:26:56,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 19:26:56,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 19:26:56,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-14 19:26:56,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 19:26:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 19:26:57,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812219895] [2020-10-14 19:26:57,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 19:26:57,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 19:26:57,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167362990] [2020-10-14 19:26:57,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 19:26:57,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 19:26:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 19:26:57,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 19:26:57,670 INFO L87 Difference]: Start difference. First operand 2537 states and 2553 transitions. Second operand 5 states.