/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=DEEPEST --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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:13:07,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:13:07,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:13:07,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:13:07,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:13:07,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:13:07,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:13:07,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:13:07,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:13:07,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:13:07,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:13:07,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:13:07,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:13:07,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:13:07,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:13:07,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:13:07,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:13:07,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:13:07,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:13:07,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:13:07,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:13:07,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:13:07,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:13:07,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:13:07,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:13:07,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:13:07,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:13:07,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:13:07,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:13:07,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:13:07,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:13:07,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:13:07,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:13:07,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:13:07,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:13:07,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:13:07,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:13:07,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:13:07,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:13:07,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:13:07,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:13:07,132 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 01:13:07,158 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:13:07,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:13:07,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:13:07,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:13:07,161 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:13:07,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:13:07,162 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:13:07,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:13:07,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:13:07,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:13:07,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:13:07,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:13:07,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:13:07,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:13:07,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:13:07,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:13:07,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:13:07,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:13:07,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:13:07,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:13:07,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:13:07,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:13:07,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:13:07,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:13:07,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:13:07,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:13:07,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:13:07,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:13:07,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:13:07,169 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:13:07,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:13:07,717 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:13:07,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:13:07,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:13:07,726 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:13:07,728 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 01:13:07,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/803cf07d2/330f10253b5546a08479b4d4db6eca49/FLAG31c45d1fb [2020-09-25 01:13:08,547 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:13:08,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 01:13:08,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/803cf07d2/330f10253b5546a08479b4d4db6eca49/FLAG31c45d1fb [2020-09-25 01:13:08,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/803cf07d2/330f10253b5546a08479b4d4db6eca49 [2020-09-25 01:13:08,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:13:08,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:13:08,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:13:08,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:13:08,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:13:08,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:13:08" (1/1) ... [2020-09-25 01:13:08,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:08, skipping insertion in model container [2020-09-25 01:13:08,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:13:08" (1/1) ... [2020-09-25 01:13:08,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:13:08,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:13:09,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:13:09,612 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:13:10,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:13:10,180 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:13:10,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10 WrapperNode [2020-09-25 01:13:10,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:13:10,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:13:10,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:13:10,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:13:10,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ... [2020-09-25 01:13:10,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:13:10,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:13:10,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:13:10,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:13:10,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (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 01:13:10,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:13:10,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:13:10,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:13:10,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:13:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:13:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 01:13:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 01:13:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 01:13:10,514 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 01:13:10,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:13:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:13:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 01:13:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 01:13:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 01:13:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 01:13:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 01:13:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 01:13:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 01:13:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:13:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:13:10,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:13:12,767 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:13:12,767 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 01:13:12,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:13:12 BoogieIcfgContainer [2020-09-25 01:13:12,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:13:12,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:13:12,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:13:12,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:13:12,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:13:08" (1/3) ... [2020-09-25 01:13:12,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bff4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:13:12, skipping insertion in model container [2020-09-25 01:13:12,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (2/3) ... [2020-09-25 01:13:12,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bff4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:13:12, skipping insertion in model container [2020-09-25 01:13:12,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:13:12" (3/3) ... [2020-09-25 01:13:12,806 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 01:13:12,817 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:13:12,830 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 01:13:12,855 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 01:13:12,896 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:13:12,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:13:12,897 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:13:12,897 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:13:12,897 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:13:12,897 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:13:12,897 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:13:12,898 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:13:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-25 01:13:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 01:13:12,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:12,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:13:12,997 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-25 01:13:13,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:13,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668146707] [2020-09-25 01:13:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:13,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:15,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:18,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:18,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:18,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 01:13:18,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:13:18,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-25 01:13:18,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:18,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:13:18,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 01:13:18,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 01:13:18,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 01:13:19,392 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 01:13:19,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:19,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:19,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 01:13:19,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:19,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-25 01:13:19,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:19,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:19,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:19,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:19,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:13:19,934 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 01:13:19,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668146707] [2020-09-25 01:13:19,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:19,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:13:19,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689148349] [2020-09-25 01:13:19,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:13:19,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:13:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:19,972 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-25 01:13:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:24,869 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-25 01:13:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:13:24,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 01:13:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:24,908 INFO L225 Difference]: With dead ends: 2019 [2020-09-25 01:13:24,908 INFO L226 Difference]: Without dead ends: 1445 [2020-09-25 01:13:24,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-25 01:13:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-25 01:13:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-25 01:13:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-25 01:13:25,059 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-25 01:13:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:25,061 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-25 01:13:25,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:13:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-25 01:13:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 01:13:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:25,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:13:25,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:13:25,073 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-25 01:13:25,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:25,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676370511] [2020-09-25 01:13:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:25,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:25,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:25,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:25,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:28,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:29,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:30,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:30,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 01:13:30,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:13:30,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-09-25 01:13:30,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:13:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-25 01:13:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 01:13:30,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:30,716 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 01:13:30,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:30,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:30,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 01:13:30,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:30,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 01:13:30,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:30,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:30,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:30,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:30,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:13:31,289 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 01:13:31,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676370511] [2020-09-25 01:13:31,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:31,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:13:31,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227776724] [2020-09-25 01:13:31,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:13:31,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:13:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:31,297 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-25 01:13:35,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:35,417 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-25 01:13:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:13:35,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 01:13:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:35,430 INFO L225 Difference]: With dead ends: 2635 [2020-09-25 01:13:35,430 INFO L226 Difference]: Without dead ends: 2144 [2020-09-25 01:13:35,433 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 01:13:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-25 01:13:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-25 01:13:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-25 01:13:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-25 01:13:35,496 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-25 01:13:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:35,497 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-25 01:13:35,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:13:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-25 01:13:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 01:13:35,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:35,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:13:35,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:13:35,510 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:35,510 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-25 01:13:35,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:35,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411437788] [2020-09-25 01:13:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:35,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:36,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:36,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:39,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:40,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:40,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 01:13:40,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:13:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-09-25 01:13:40,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 01:13:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-25 01:13:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-25 01:13:40,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:41,273 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 01:13:41,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:41,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:41,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:41,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 01:13:41,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:41,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 01:13:41,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:41,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:41,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:41,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:41,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:41,577 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 01:13:41,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411437788] [2020-09-25 01:13:41,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:41,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:13:41,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790398832] [2020-09-25 01:13:41,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:13:41,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:13:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:13:41,581 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-25 01:13:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:48,893 INFO L93 Difference]: Finished difference Result 5777 states and 7153 transitions. [2020-09-25 01:13:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:13:48,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-25 01:13:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:48,915 INFO L225 Difference]: With dead ends: 5777 [2020-09-25 01:13:48,915 INFO L226 Difference]: Without dead ends: 3969 [2020-09-25 01:13:48,921 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 01:13:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2020-09-25 01:13:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3838. [2020-09-25 01:13:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3838 states. [2020-09-25 01:13:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 4748 transitions. [2020-09-25 01:13:49,070 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 4748 transitions. Word has length 456 [2020-09-25 01:13:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:49,071 INFO L479 AbstractCegarLoop]: Abstraction has 3838 states and 4748 transitions. [2020-09-25 01:13:49,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:13:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 4748 transitions. [2020-09-25 01:13:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-25 01:13:49,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:49,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:13:49,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:13:49,088 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1246597683, now seen corresponding path program 1 times [2020-09-25 01:13:49,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:49,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072307677] [2020-09-25 01:13:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:49,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:52,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:53,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:54,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:54,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-25 01:13:54,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:13:54,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-09-25 01:13:54,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:54,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:13:54,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-25 01:13:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 01:13:54,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:13:54,594 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 01:13:54,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:54,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:54,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:54,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 01:13:54,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:54,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 01:13:54,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:54,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:54,777 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 01:13:54,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072307677] [2020-09-25 01:13:54,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:54,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:13:54,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980430685] [2020-09-25 01:13:54,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:13:54,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:13:54,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:54,780 INFO L87 Difference]: Start difference. First operand 3838 states and 4748 transitions. Second operand 4 states.