/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=NARROWEST --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 02:22:31,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:22:31,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:22:31,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:22:31,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:22:31,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:22:31,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:22:31,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:22:31,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:22:31,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:22:31,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:22:31,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:22:31,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:22:31,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:22:31,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:22:31,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:22:31,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:22:31,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:22:31,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:22:31,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:22:31,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:22:31,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:22:31,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:22:31,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:22:31,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:22:31,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:22:31,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:22:31,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:22:31,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:22:31,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:22:31,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:22:31,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:22:31,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:22:31,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:22:31,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:22:31,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:22:31,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:22:31,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:22:31,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:22:31,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:22:31,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:22:31,887 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 02:22:31,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:22:31,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:22:31,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:22:31,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:22:31,939 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:22:31,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:22:31,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:22:31,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:22:31,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:22:31,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:22:31,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:22:31,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:22:31,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:22:31,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:22:31,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:22:31,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:22:31,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:22:31,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:22:31,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:22:31,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:22:31,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:22:31,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:22:31,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:22:31,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:22:31,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:22:31,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:22:31,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:22:31,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:22:31,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:22:31,946 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:22:32,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:22:32,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:22:32,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:22:32,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:22:32,449 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:22:32,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 02:22:32,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8e43fb25/ff95ba7be54d403884b7ae430ecf8715/FLAG557ee382f [2020-09-25 02:22:33,213 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:22:33,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 02:22:33,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8e43fb25/ff95ba7be54d403884b7ae430ecf8715/FLAG557ee382f [2020-09-25 02:22:33,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8e43fb25/ff95ba7be54d403884b7ae430ecf8715 [2020-09-25 02:22:33,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:22:33,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:22:33,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:33,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:22:33,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:22:33,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:33" (1/1) ... [2020-09-25 02:22:33,474 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 25.09 02:22:33, skipping insertion in model container [2020-09-25 02:22:33,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:33" (1/1) ... [2020-09-25 02:22:33,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:22:33,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:22:34,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:34,274 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:22:34,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:34,520 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:22:34,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34 WrapperNode [2020-09-25 02:22:34,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:34,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:22:34,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:22:34,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:22:34,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:22:34,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:22:34,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:22:34,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:22:34,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (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 02:22:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:22:34,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:22:34,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:22:34,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:22:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:22:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 02:22:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 02:22:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 02:22:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 02:22:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:22:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:22:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 02:22:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 02:22:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 02:22:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 02:22:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 02:22:34,800 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 02:22:34,800 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 02:22:34,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:22:34,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:22:34,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:22:37,174 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:22:37,174 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:22:37,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:37 BoogieIcfgContainer [2020-09-25 02:22:37,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:22:37,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:22:37,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:22:37,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:22:37,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:22:33" (1/3) ... [2020-09-25 02:22:37,198 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 25.09 02:22:37, skipping insertion in model container [2020-09-25 02:22:37,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34" (2/3) ... [2020-09-25 02:22:37,199 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 25.09 02:22:37, skipping insertion in model container [2020-09-25 02:22:37,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:37" (3/3) ... [2020-09-25 02:22:37,202 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 02:22:37,213 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:22:37,226 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 02:22:37,250 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 02:22:37,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:22:37,282 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:22:37,282 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:22:37,282 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:22:37,282 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:22:37,282 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:22:37,283 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:22:37,283 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:22:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-25 02:22:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 02:22:37,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:37,373 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 02:22:37,374 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-25 02:22:37,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:37,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010404781] [2020-09-25 02:22:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:38,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:38,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:42,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:43,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:43,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 02:22:43,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 02:22:43,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-25 02:22:43,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:22:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-25 02:22:43,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 02:22:43,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:22:43,832 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 02:22:43,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:43,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:43,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 02:22:43,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:43,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 02:22:43,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:43,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:44,251 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 02:22:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010404781] [2020-09-25 02:22:44,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:44,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:22:44,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864576212] [2020-09-25 02:22:44,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:22:44,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:22:44,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:22:44,300 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 5 states. [2020-09-25 02:22:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:53,177 INFO L93 Difference]: Finished difference Result 3267 states and 4215 transitions. [2020-09-25 02:22:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:22:53,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-25 02:22:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:53,227 INFO L225 Difference]: With dead ends: 3267 [2020-09-25 02:22:53,227 INFO L226 Difference]: Without dead ends: 1937 [2020-09-25 02:22:53,242 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 02:22:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2020-09-25 02:22:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1822. [2020-09-25 02:22:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2020-09-25 02:22:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2161 transitions. [2020-09-25 02:22:53,417 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2161 transitions. Word has length 456 [2020-09-25 02:22:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:22:53,418 INFO L479 AbstractCegarLoop]: Abstraction has 1822 states and 2161 transitions. [2020-09-25 02:22:53,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:22:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2161 transitions. [2020-09-25 02:22:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-25 02:22:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:53,432 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 02:22:53,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:22:53,433 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2132171989, now seen corresponding path program 1 times [2020-09-25 02:22:53,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:53,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124030406] [2020-09-25 02:22:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:53,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:53,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:54,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:58,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:58,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-25 02:22:58,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 02:22:58,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-09-25 02:22:58,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:22:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-09-25 02:22:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 02:22:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:58,903 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 02:22:58,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:58,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:58,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:58,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 02:22:58,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:58,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 02:22:58,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:58,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:58,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:59,360 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 02:22:59,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124030406] [2020-09-25 02:22:59,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:59,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:22:59,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522162678] [2020-09-25 02:22:59,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:22:59,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:22:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:22:59,370 INFO L87 Difference]: Start difference. First operand 1822 states and 2161 transitions. Second operand 4 states. [2020-09-25 02:23:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:03,808 INFO L93 Difference]: Finished difference Result 5077 states and 6079 transitions. [2020-09-25 02:23:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:23:03,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 457 [2020-09-25 02:23:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:03,827 INFO L225 Difference]: With dead ends: 5077 [2020-09-25 02:23:03,827 INFO L226 Difference]: Without dead ends: 3458 [2020-09-25 02:23:03,832 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 02:23:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2020-09-25 02:23:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 1825. [2020-09-25 02:23:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1825 states. [2020-09-25 02:23:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2165 transitions. [2020-09-25 02:23:03,909 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2165 transitions. Word has length 457 [2020-09-25 02:23:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:03,910 INFO L479 AbstractCegarLoop]: Abstraction has 1825 states and 2165 transitions. [2020-09-25 02:23:03,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:23:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2165 transitions. [2020-09-25 02:23:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-25 02:23:03,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:03,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:23:03,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:23:03,917 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1341329456, now seen corresponding path program 1 times [2020-09-25 02:23:03,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:03,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82426048] [2020-09-25 02:23:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:04,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:04,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:04,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:04,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:05,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:06,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:08,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:09,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-09-25 02:23:09,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:23:09,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 02:23:09,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:23:09,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-09-25 02:23:09,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 02:23:09,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:09,527 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 02:23:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:23:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:09,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:09,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 02:23:09,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:23:09,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 02:23:09,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:09,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:23:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:23:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:23:09,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:09,771 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 02:23:09,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82426048] [2020-09-25 02:23:09,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:23:09,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:23:09,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566653973] [2020-09-25 02:23:09,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:23:09,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:23:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:23:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:23:09,775 INFO L87 Difference]: Start difference. First operand 1825 states and 2165 transitions. Second operand 5 states. [2020-09-25 02:23:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:14,222 INFO L93 Difference]: Finished difference Result 5049 states and 6041 transitions. [2020-09-25 02:23:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:23:14,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 458 [2020-09-25 02:23:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:14,245 INFO L225 Difference]: With dead ends: 5049 [2020-09-25 02:23:14,245 INFO L226 Difference]: Without dead ends: 3435 [2020-09-25 02:23:14,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:23:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-09-25 02:23:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 1833. [2020-09-25 02:23:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2020-09-25 02:23:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2174 transitions. [2020-09-25 02:23:14,330 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2174 transitions. Word has length 458 [2020-09-25 02:23:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:14,331 INFO L479 AbstractCegarLoop]: Abstraction has 1833 states and 2174 transitions. [2020-09-25 02:23:14,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:23:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2174 transitions. [2020-09-25 02:23:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-25 02:23:14,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:14,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:23:14,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:23:14,337 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash -868847696, now seen corresponding path program 1 times [2020-09-25 02:23:14,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:14,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889076367] [2020-09-25 02:23:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:14,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:14,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:18,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:19,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:19,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-09-25 02:23:19,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 02:23:19,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-25 02:23:19,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:23:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-09-25 02:23:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 02:23:19,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:19,932 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 02:23:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:23:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:19,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:19,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 02:23:19,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:23:19,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 02:23:19,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:19,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:23:19,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:23:19,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:23:19,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:23:20,242 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 02:23:20,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889076367] [2020-09-25 02:23:20,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:23:20,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:23:20,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284096532] [2020-09-25 02:23:20,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:23:20,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:23:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:23:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:23:20,245 INFO L87 Difference]: Start difference. First operand 1833 states and 2174 transitions. Second operand 4 states.