/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 SingleStatement --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=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:20:20,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:20:20,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:20:20,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:20:20,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:20:20,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:20:20,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:20:20,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:20:20,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:20:20,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:20:20,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:20:20,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:20:20,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:20:20,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:20:20,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:20:20,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:20:20,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:20:20,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:20:20,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:20:20,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:20:20,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:20:20,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:20:20,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:20:20,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:20:20,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:20:20,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:20:20,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:20:20,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:20:20,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:20:20,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:20:20,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:20:20,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:20:20,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:20:20,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:20:20,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:20:20,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:20:20,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:20:20,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:20:20,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:20:20,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:20:20,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:20:20,446 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 [2020-09-25 10:20:20,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:20:20,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:20:20,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:20:20,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:20:20,476 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:20:20,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:20:20,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:20:20,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:20:20,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:20:20,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:20:20,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:20:20,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:20:20,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:20:20,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:20:20,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:20:20,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:20:20,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:20:20,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:20:20,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:20:20,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:20:20,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:20:20,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:20:20,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:20:20,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:20:20,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:20:20,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:20:20,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:20:20,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:20:20,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:20:20,481 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 -> SingleStatement 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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=true; [2020-09-25 10:20:20,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:20:20,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:20:20,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:20:20,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:20:20,990 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:20:20,992 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 10:20:21,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b28fff00f/d685c725bc7f4f979cdd80b1ce3d9e93/FLAGb63cb3c2a [2020-09-25 10:20:21,736 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:20:21,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 10:20:21,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b28fff00f/d685c725bc7f4f979cdd80b1ce3d9e93/FLAGb63cb3c2a [2020-09-25 10:20:21,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b28fff00f/d685c725bc7f4f979cdd80b1ce3d9e93 [2020-09-25 10:20:21,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:20:21,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:20:21,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:20:21,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:20:21,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:20:21,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:20:21" (1/1) ... [2020-09-25 10:20:22,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:21, skipping insertion in model container [2020-09-25 10:20:22,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:20:21" (1/1) ... [2020-09-25 10:20:22,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:20:22,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:20:22,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:20:22,707 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:20:22,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:20:22,893 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:20:22,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22 WrapperNode [2020-09-25 10:20:22,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:20:22,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:20:22,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:20:22,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:20:22,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (1/1) ... [2020-09-25 10:20:22,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:20:22,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:20:22,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:20:22,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:20:22,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (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 [2020-09-25 10:20:23,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:20:23,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:20:23,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 10:20:23,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:20:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:20:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 10:20:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 10:20:23,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 10:20:23,110 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 10:20:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:20:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 10:20:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 10:20:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 10:20:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 10:20:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 10:20:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 10:20:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 10:20:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 10:20:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:20:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:20:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:20:25,000 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:20:25,000 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 10:20:25,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:20:25 BoogieIcfgContainer [2020-09-25 10:20:25,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:20:25,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:20:25,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:20:25,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:20:25,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:20:21" (1/3) ... [2020-09-25 10:20:25,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747b08d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:20:25, skipping insertion in model container [2020-09-25 10:20:25,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:22" (2/3) ... [2020-09-25 10:20:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747b08d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:20:25, skipping insertion in model container [2020-09-25 10:20:25,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:20:25" (3/3) ... [2020-09-25 10:20:25,022 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 10:20:25,035 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:20:25,047 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:20:25,071 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:20:25,112 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:20:25,112 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:20:25,112 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:20:25,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:20:25,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:20:25,112 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:20:25,112 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:20:25,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:20:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-25 10:20:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 10:20:25,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:25,198 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] [2020-09-25 10:20:25,198 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-25 10:20:25,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:25,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888631041] [2020-09-25 10:20:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:26,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:26,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:30,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:30,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:30,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 10:20:30,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:20:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-09-25 10:20:30,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:30,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:30,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:20:30,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-25 10:20:30,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 10:20:30,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 10:20:31,655 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 10:20:31,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:20:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:31,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:31,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:31,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 10:20:31,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:20:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 10:20:31,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:31,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:20:31,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:20:31,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:20:31,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:20:32,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888631041] [2020-09-25 10:20:32,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:20:32,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:20:32,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4917696] [2020-09-25 10:20:32,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:20:32,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:20:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:20:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:20:32,133 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-25 10:20:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:20:35,830 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-25 10:20:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 10:20:35,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 10:20:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:20:35,865 INFO L225 Difference]: With dead ends: 1657 [2020-09-25 10:20:35,865 INFO L226 Difference]: Without dead ends: 1241 [2020-09-25 10:20:35,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:20:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-25 10:20:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-25 10:20:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 10:20:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-25 10:20:36,004 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-25 10:20:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:20:36,006 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-25 10:20:36,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:20:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-25 10:20:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 10:20:36,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:36,019 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] [2020-09-25 10:20:36,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:20:36,019 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:36,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-25 10:20:36,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:36,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745038704] [2020-09-25 10:20:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:36,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:36,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:36,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:36,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:39,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:41,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:41,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 10:20:41,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:20:41,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-25 10:20:41,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:41,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:41,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:20:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-25 10:20:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 10:20:41,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:41,644 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 10:20:41,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:20:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:41,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:41,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:41,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 10:20:41,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:20:41,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 10:20:41,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:41,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:41,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:20:41,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:20:41,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:20:41,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:20:42,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745038704] [2020-09-25 10:20:42,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:20:42,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:20:42,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524935455] [2020-09-25 10:20:42,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:20:42,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:20:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:20:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:20:42,235 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-25 10:20:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:20:45,463 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-25 10:20:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 10:20:45,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 10:20:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:20:45,476 INFO L225 Difference]: With dead ends: 2498 [2020-09-25 10:20:45,477 INFO L226 Difference]: Without dead ends: 2052 [2020-09-25 10:20:45,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:20:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-25 10:20:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-25 10:20:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-25 10:20:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-25 10:20:45,563 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-25 10:20:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:20:45,564 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-25 10:20:45,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:20:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-25 10:20:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 10:20:45,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:45,571 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] [2020-09-25 10:20:45,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:20:45,571 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-25 10:20:45,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:45,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571043165] [2020-09-25 10:20:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:46,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:46,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:47,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:47,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:50,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:50,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:50,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 10:20:50,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:20:50,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 10:20:50,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:50,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:20:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-25 10:20:50,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-25 10:20:50,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:51,251 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 10:20:51,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:20:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:51,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:51,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 10:20:51,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:20:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 10:20:51,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:51,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:20:51,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:20:51,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:20:51,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:20:51,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571043165] [2020-09-25 10:20:51,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:20:51,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:20:51,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140534656] [2020-09-25 10:20:51,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:20:51,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:20:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:20:51,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:20:51,711 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-25 10:20:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:20:56,275 INFO L93 Difference]: Finished difference Result 5618 states and 7070 transitions. [2020-09-25 10:20:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:20:56,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-25 10:20:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:20:56,294 INFO L225 Difference]: With dead ends: 5618 [2020-09-25 10:20:56,294 INFO L226 Difference]: Without dead ends: 3766 [2020-09-25 10:20:56,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:20:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2020-09-25 10:20:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3764. [2020-09-25 10:20:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3764 states. [2020-09-25 10:20:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 4700 transitions. [2020-09-25 10:20:56,419 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 4700 transitions. Word has length 449 [2020-09-25 10:20:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:20:56,420 INFO L479 AbstractCegarLoop]: Abstraction has 3764 states and 4700 transitions. [2020-09-25 10:20:56,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:20:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 4700 transitions. [2020-09-25 10:20:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-25 10:20:56,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:56,428 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] [2020-09-25 10:20:56,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:20:56,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2002315190, now seen corresponding path program 1 times [2020-09-25 10:20:56,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:56,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994052533] [2020-09-25 10:20:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:56,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:56,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:56,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:57,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:57,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:58,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:01,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:21:01,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-25 10:21:01,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:21:01,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 10:21:01,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:21:01,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:21:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:21:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-25 10:21:01,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 10:21:01,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:21:01,968 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 10:21:01,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:21:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:21:01,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:02,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:21:02,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 10:21:02,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:21:02,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 10:21:02,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:21:02,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:21:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:21:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:21:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:21:02,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:21:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:21:02,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994052533] [2020-09-25 10:21:02,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:21:02,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:21:02,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463202116] [2020-09-25 10:21:02,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:21:02,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:21:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:21:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:21:02,356 INFO L87 Difference]: Start difference. First operand 3764 states and 4700 transitions. Second operand 5 states.