/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=NARROWEST --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/Problem19_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:58:17,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:58:17,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:58:17,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:58:17,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:58:17,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:58:17,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:58:17,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:58:17,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:58:17,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:58:17,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:58:17,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:58:17,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:58:17,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:58:17,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:58:17,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:58:17,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:58:17,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:58:17,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:58:17,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:58:17,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:58:17,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:58:17,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:58:17,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:58:17,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:58:17,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:58:17,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:58:17,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:58:17,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:58:17,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:58:17,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:58:17,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:58:17,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:58:17,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:58:17,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:58:17,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:58:17,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:58:17,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:58:17,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:58:17,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:58:17,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:58:17,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 09:58:17,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:58:17,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:58:17,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:58:17,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:58:17,734 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:58:17,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:58:17,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:58:17,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:58:17,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:58:17,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:58:17,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:58:17,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:58:17,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:58:17,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:58:17,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:58:17,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:58:17,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:58:17,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:58:17,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:58:17,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:58:17,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:58:17,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:58:17,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:58:17,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:58:17,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:58:17,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:58:17,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:58:17,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:58:17,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:58:17,743 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 09:58:18,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:58:18,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:58:18,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:58:18,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:58:18,074 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:58:18,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label08.c [2020-10-13 09:58:18,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa379486f/6f5d33bd22ef45feaf13793a0ee6ecc6/FLAG23a47e3ea [2020-10-13 09:58:19,101 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:58:19,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label08.c [2020-10-13 09:58:19,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa379486f/6f5d33bd22ef45feaf13793a0ee6ecc6/FLAG23a47e3ea [2020-10-13 09:58:19,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa379486f/6f5d33bd22ef45feaf13793a0ee6ecc6 [2020-10-13 09:58:19,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:58:19,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:58:19,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:58:19,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:58:19,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:58:19,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:58:19" (1/1) ... [2020-10-13 09:58:19,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0c35a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:19, skipping insertion in model container [2020-10-13 09:58:19,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:58:19" (1/1) ... [2020-10-13 09:58:19,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:58:19,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:58:21,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:58:22,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:58:22,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:58:23,032 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:58:23,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23 WrapperNode [2020-10-13 09:58:23,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:58:23,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:58:23,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:58:23,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:58:23,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... [2020-10-13 09:58:23,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:58:23,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:58:23,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:58:23,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:58:23,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:58:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:58:23,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:58:23,683 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:58:23,683 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:58:23,683 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 09:58:23,684 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 09:58:23,684 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 09:58:23,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 09:58:23,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:58:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:58:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:58:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 09:58:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 09:58:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 09:58:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 09:58:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:58:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:58:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:58:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:58:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:58:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:58:35,767 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:58:35,768 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:58:35,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:58:35 BoogieIcfgContainer [2020-10-13 09:58:35,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:58:35,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:58:35,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:58:35,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:58:35,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:58:19" (1/3) ... [2020-10-13 09:58:35,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d2618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:58:35, skipping insertion in model container [2020-10-13 09:58:35,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:58:23" (2/3) ... [2020-10-13 09:58:35,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d2618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:58:35, skipping insertion in model container [2020-10-13 09:58:35,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:58:35" (3/3) ... [2020-10-13 09:58:35,793 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label08.c [2020-10-13 09:58:35,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:58:35,814 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:58:35,828 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:58:35,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:58:35,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:58:35,860 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:58:35,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:58:35,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:58:35,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:58:35,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:58:35,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:58:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 09:58:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 09:58:35,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:35,914 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] [2020-10-13 09:58:35,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1339858220, now seen corresponding path program 1 times [2020-10-13 09:58:35,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:35,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358977542] [2020-10-13 09:58:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:36,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:36,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 09:58:36,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:36,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-13 09:58:36,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:58:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:58:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 09:58:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:58:36,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:58:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:36,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:36,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:36,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:58:36,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:36,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 09:58:36,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:58:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:58:36,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358977542] [2020-10-13 09:58:36,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:58:36,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 09:58:36,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105987890] [2020-10-13 09:58:36,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:58:36,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:58:36,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:58:36,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:58:36,735 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-13 09:59:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:59:07,625 INFO L93 Difference]: Finished difference Result 6573 states and 12489 transitions. [2020-10-13 09:59:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:59:07,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-13 09:59:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:59:07,679 INFO L225 Difference]: With dead ends: 6573 [2020-10-13 09:59:07,680 INFO L226 Difference]: Without dead ends: 4728 [2020-10-13 09:59:07,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:59:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2020-10-13 09:59:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4625. [2020-10-13 09:59:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4625 states. [2020-10-13 09:59:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 8166 transitions. [2020-10-13 09:59:07,905 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 8166 transitions. Word has length 43 [2020-10-13 09:59:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:59:07,906 INFO L479 AbstractCegarLoop]: Abstraction has 4625 states and 8166 transitions. [2020-10-13 09:59:07,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:59:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 8166 transitions. [2020-10-13 09:59:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 09:59:07,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:59:07,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:59:07,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:59:07,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:59:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:59:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash -538363522, now seen corresponding path program 1 times [2020-10-13 09:59:07,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:59:07,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481088113] [2020-10-13 09:59:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:59:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:07,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:08,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:08,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:09,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:09,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 09:59:09,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:59:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-13 09:59:09,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:59:09,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 09:59:09,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 09:59:09,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:59:09,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:59:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:09,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:09,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:09,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:59:09,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:09,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:59:09,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:59:09,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:09,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:59:09,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:59:09,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:59:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:09,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:09,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:59:09,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:09,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 09:59:09,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:09,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:59:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:59:09,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:59:09,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481088113] [2020-10-13 09:59:09,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:59:09,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:59:09,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646424885] [2020-10-13 09:59:09,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:59:09,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:59:09,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:59:09,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:59:09,395 INFO L87 Difference]: Start difference. First operand 4625 states and 8166 transitions. Second operand 5 states. [2020-10-13 09:59:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:59:43,369 INFO L93 Difference]: Finished difference Result 13495 states and 24172 transitions. [2020-10-13 09:59:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:59:43,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-13 09:59:43,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:59:43,412 INFO L225 Difference]: With dead ends: 13495 [2020-10-13 09:59:43,413 INFO L226 Difference]: Without dead ends: 8876 [2020-10-13 09:59:43,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:59:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2020-10-13 09:59:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 8868. [2020-10-13 09:59:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8868 states. [2020-10-13 09:59:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 13242 transitions. [2020-10-13 09:59:43,737 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 13242 transitions. Word has length 118 [2020-10-13 09:59:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:59:43,738 INFO L479 AbstractCegarLoop]: Abstraction has 8868 states and 13242 transitions. [2020-10-13 09:59:43,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:59:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 13242 transitions. [2020-10-13 09:59:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 09:59:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:59:43,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:59:43,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:59:43,743 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:59:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:59:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1533538378, now seen corresponding path program 1 times [2020-10-13 09:59:43,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:59:43,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990946851] [2020-10-13 09:59:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:59:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:43,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:44,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:44,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 09:59:44,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-13 09:59:44,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:59:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:59:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 09:59:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:44,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:59:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:44,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:44,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:59:44,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:44,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 09:59:44,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:59:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:59:44,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:59:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:44,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:44,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:44,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 09:59:44,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:44,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 09:59:44,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:44,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:59:44,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:59:44,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 09:59:44,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:59:44,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990946851] [2020-10-13 09:59:44,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:59:44,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 09:59:44,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014124593] [2020-10-13 09:59:44,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 09:59:44,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:59:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 09:59:44,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:59:44,592 INFO L87 Difference]: Start difference. First operand 8868 states and 13242 transitions. Second operand 7 states. [2020-10-13 10:00:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:00:45,634 INFO L93 Difference]: Finished difference Result 26602 states and 40303 transitions. [2020-10-13 10:00:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:00:45,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-13 10:00:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:00:45,720 INFO L225 Difference]: With dead ends: 26602 [2020-10-13 10:00:45,720 INFO L226 Difference]: Without dead ends: 17740 [2020-10-13 10:00:45,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:00:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17740 states. [2020-10-13 10:00:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17740 to 16192. [2020-10-13 10:00:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16192 states. [2020-10-13 10:00:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16192 states to 16192 states and 23914 transitions. [2020-10-13 10:00:46,213 INFO L78 Accepts]: Start accepts. Automaton has 16192 states and 23914 transitions. Word has length 124 [2020-10-13 10:00:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:00:46,213 INFO L479 AbstractCegarLoop]: Abstraction has 16192 states and 23914 transitions. [2020-10-13 10:00:46,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:00:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 16192 states and 23914 transitions. [2020-10-13 10:00:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 10:00:46,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:00:46,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:00:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:00:46,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:00:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:00:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1521077410, now seen corresponding path program 1 times [2020-10-13 10:00:46,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:00:46,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666103191] [2020-10-13 10:00:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:00:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:46,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:46,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:46,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:47,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:47,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 10:00:47,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:00:47,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-13 10:00:47,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 134 [2020-10-13 10:00:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:00:47,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 10:00:47,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:00:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:47,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:47,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:47,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:00:47,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:47,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:00:47,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:00:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:00:47,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:00:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:00:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:47,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:47,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 10:00:47,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 10:00:47,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-13 10:00:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:00:47,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:00:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:00:47,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666103191] [2020-10-13 10:00:47,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:00:47,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:00:47,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799825038] [2020-10-13 10:00:47,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:00:47,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:00:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:00:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:00:47,657 INFO L87 Difference]: Start difference. First operand 16192 states and 23914 transitions. Second operand 5 states. [2020-10-13 10:01:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:01:47,338 INFO L93 Difference]: Finished difference Result 43819 states and 64995 transitions. [2020-10-13 10:01:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:01:47,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-13 10:01:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:01:47,494 INFO L225 Difference]: With dead ends: 43819 [2020-10-13 10:01:47,494 INFO L226 Difference]: Without dead ends: 27633 [2020-10-13 10:01:47,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:01:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27633 states. [2020-10-13 10:01:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27633 to 27551. [2020-10-13 10:01:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27551 states. [2020-10-13 10:01:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27551 states to 27551 states and 38393 transitions. [2020-10-13 10:01:48,299 INFO L78 Accepts]: Start accepts. Automaton has 27551 states and 38393 transitions. Word has length 169 [2020-10-13 10:01:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:01:48,304 INFO L479 AbstractCegarLoop]: Abstraction has 27551 states and 38393 transitions. [2020-10-13 10:01:48,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:01:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 27551 states and 38393 transitions. [2020-10-13 10:01:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 10:01:48,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:01:48,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:01:48,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:01:48,311 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:01:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:01:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1633526808, now seen corresponding path program 1 times [2020-10-13 10:01:48,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:01:48,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194766179] [2020-10-13 10:01:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:01:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:49,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:50,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:50,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 10:01:50,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:01:50,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1902 [2020-10-13 10:01:50,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:50,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:01:50,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-13 10:01:50,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:01:50,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:01:50,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:01:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:50,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:50,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:01:50,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:01:50,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:01:50,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:01:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:01:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:01:50,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:01:50,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:01:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:01:50,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:01:50,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:01:50,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 10:01:50,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:01:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-13 10:01:50,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:01:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:01:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:01:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-13 10:01:50,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:01:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:01:50,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194766179] [2020-10-13 10:01:50,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:01:50,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:01:50,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209353658] [2020-10-13 10:01:50,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:01:50,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:01:50,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:01:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:01:50,911 INFO L87 Difference]: Start difference. First operand 27551 states and 38393 transitions. Second operand 5 states.