/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=HIGHLEXORDER --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 [2020-09-24 22:58:57,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:58:57,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:58:57,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:58:57,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:58:57,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:58:57,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:58:57,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:58:57,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:58:57,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:58:57,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:58:57,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:58:57,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:58:57,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:58:57,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:58:57,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:58:57,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:58:57,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:58:57,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:58:57,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:58:57,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:58:57,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:58:57,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:58:57,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:58:57,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:58:57,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:58:57,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:58:57,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:58:57,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:58:57,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:58:57,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:58:57,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:58:57,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:58:57,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:58:57,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:58:57,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:58:57,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:58:57,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:58:57,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:58:57,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:58:57,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:58:57,738 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 [2020-09-24 22:58:57,784 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:58:57,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:58:57,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:58:57,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:58:57,787 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:58:57,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:58:57,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:58:57,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:58:57,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:58:57,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:58:57,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:58:57,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:58:57,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:58:57,790 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:58:57,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:58:57,791 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:58:57,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:58:57,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:58:57,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:58:57,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:58:57,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:58:57,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:58:57,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:58:57,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:58:57,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:58:57,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:58:57,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:58:57,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:58:57,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:58:57,794 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:58:58,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:58:58,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:58:58,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:58:58,278 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:58:58,278 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:58:58,279 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 22:58:58,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/501387b32/e7a42ba74f074452ac26d780ffbc8f26/FLAG8962e25d3 [2020-09-24 22:58:59,062 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:58:59,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 22:58:59,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/501387b32/e7a42ba74f074452ac26d780ffbc8f26/FLAG8962e25d3 [2020-09-24 22:58:59,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/501387b32/e7a42ba74f074452ac26d780ffbc8f26 [2020-09-24 22:58:59,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:58:59,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:58:59,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:59,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:58:59,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:58:59,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a9c366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59, skipping insertion in model container [2020-09-24 22:58:59,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:58:59,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:59:00,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:59:00,114 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:59:00,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:59:00,650 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:59:00,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00 WrapperNode [2020-09-24 22:59:00,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:59:00,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:59:00,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:59:00,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:59:00,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (1/1) ... [2020-09-24 22:59:00,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:59:00,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:59:00,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:59:00,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:59:00,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (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 [2020-09-24 22:59:00,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:59:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:59:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:59:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:59:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:59:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 22:59:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 22:59:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 22:59:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 22:59:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:59:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:59:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 22:59:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 22:59:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 22:59:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 22:59:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 22:59:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 22:59:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 22:59:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:59:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:59:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:59:03,051 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:59:03,052 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:59:03,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:03 BoogieIcfgContainer [2020-09-24 22:59:03,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:59:03,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:59:03,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:59:03,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:59:03,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:58:59" (1/3) ... [2020-09-24 22:59:03,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5458f832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:03, skipping insertion in model container [2020-09-24 22:59:03,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:00" (2/3) ... [2020-09-24 22:59:03,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5458f832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:03, skipping insertion in model container [2020-09-24 22:59:03,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:03" (3/3) ... [2020-09-24 22:59:03,081 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 22:59:03,091 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:59:03,104 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-24 22:59:03,124 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-24 22:59:03,159 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:59:03,159 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:59:03,159 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:59:03,159 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:59:03,159 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:59:03,160 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:59:03,160 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:59:03,160 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:59:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-24 22:59:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 22:59:03,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:03,253 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] [2020-09-24 22:59:03,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-24 22:59:03,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:03,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010404781] [2020-09-24 22:59:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:05,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:05,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:08,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:08,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:08,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 22:59:08,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:59:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 22:59:08,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-24 22:59:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-24 22:59:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:59:09,506 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 22:59:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:09,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:09,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:09,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 22:59:09,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 22:59:09,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:09,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:59:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:10,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010404781] [2020-09-24 22:59:10,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:10,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:10,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705670869] [2020-09-24 22:59:10,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:10,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:10,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:10,103 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-24 22:59:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:15,233 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-24 22:59:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:15,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-24 22:59:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:15,271 INFO L225 Difference]: With dead ends: 2019 [2020-09-24 22:59:15,271 INFO L226 Difference]: Without dead ends: 1445 [2020-09-24 22:59:15,281 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 [2020-09-24 22:59:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-24 22:59:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-24 22:59:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-24 22:59:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-24 22:59:15,423 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-24 22:59:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-24 22:59:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-24 22:59:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 22:59:15,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:15,445 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] [2020-09-24 22:59:15,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:59:15,445 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-24 22:59:15,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:15,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264105322] [2020-09-24 22:59:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:16,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:16,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:20,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:20,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:20,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 22:59:20,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:59:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-24 22:59:20,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:20,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-24 22:59:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-24 22:59:20,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:21,204 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 22:59:21,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:21,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:21,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 22:59:21,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:21,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 22:59:21,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:21,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:21,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264105322] [2020-09-24 22:59:21,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:21,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:21,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653345254] [2020-09-24 22:59:21,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:21,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:21,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:21,580 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-24 22:59:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:25,342 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-24 22:59:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:25,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-24 22:59:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:25,355 INFO L225 Difference]: With dead ends: 2635 [2020-09-24 22:59:25,355 INFO L226 Difference]: Without dead ends: 2144 [2020-09-24 22:59:25,358 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 [2020-09-24 22:59:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-24 22:59:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-24 22:59:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-24 22:59:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-24 22:59:25,419 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-24 22:59:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:25,420 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-24 22:59:25,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-24 22:59:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 22:59:25,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:25,431 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] [2020-09-24 22:59:25,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:59:25,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:25,432 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-24 22:59:25,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:25,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088259131] [2020-09-24 22:59:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:25,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:25,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:29,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:30,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:30,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 22:59:30,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:59:30,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-09-24 22:59:30,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:30,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:59:30,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-24 22:59:30,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 22:59:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:31,109 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 22:59:31,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:31,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:31,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:31,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 22:59:31,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:31,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 22:59:31,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:31,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:31,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:59:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:31,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088259131] [2020-09-24 22:59:31,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:31,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:59:31,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491963523] [2020-09-24 22:59:31,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:59:31,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:59:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:59:31,474 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-24 22:59:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:38,775 INFO L93 Difference]: Finished difference Result 5777 states and 7153 transitions. [2020-09-24 22:59:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:59:38,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-24 22:59:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:38,796 INFO L225 Difference]: With dead ends: 5777 [2020-09-24 22:59:38,796 INFO L226 Difference]: Without dead ends: 3969 [2020-09-24 22:59:38,802 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 [2020-09-24 22:59:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2020-09-24 22:59:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3838. [2020-09-24 22:59:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3838 states. [2020-09-24 22:59:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 4748 transitions. [2020-09-24 22:59:38,948 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 4748 transitions. Word has length 456 [2020-09-24 22:59:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:38,949 INFO L479 AbstractCegarLoop]: Abstraction has 3838 states and 4748 transitions. [2020-09-24 22:59:38,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:59:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 4748 transitions. [2020-09-24 22:59:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-24 22:59:38,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:38,957 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] [2020-09-24 22:59:38,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:59:38,958 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1246597683, now seen corresponding path program 1 times [2020-09-24 22:59:38,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:38,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355263043] [2020-09-24 22:59:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:39,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:40,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:42,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:43,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:44,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:44,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-24 22:59:44,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:59:44,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-24 22:59:44,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:44,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:44,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 22:59:44,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 22:59:44,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:44,608 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 22:59:44,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:44,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:44,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 22:59:44,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:44,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 22:59:44,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:44,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:44,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:44,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355263043] [2020-09-24 22:59:44,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:44,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:44,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424051244] [2020-09-24 22:59:44,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:44,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:44,873 INFO L87 Difference]: Start difference. First operand 3838 states and 4748 transitions. Second operand 4 states.