/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:14:25,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:14:25,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:14:25,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:14:25,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:14:25,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:14:25,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:14:25,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:14:25,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:14:25,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:14:25,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:14:25,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:14:25,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:14:25,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:14:25,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:14:25,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:14:25,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:14:25,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:14:25,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:14:25,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:14:25,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:14:25,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:14:25,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:14:25,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:14:25,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:14:25,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:14:25,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:14:25,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:14:25,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:14:25,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:14:25,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:14:25,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:14:25,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:14:25,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:14:25,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:14:25,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:14:25,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:14:25,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:14:25,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:14:25,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:14:25,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:14:25,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:14:25,975 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:14:25,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:14:25,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:14:25,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:14:25,978 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:14:25,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:14:25,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:14:25,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:14:25,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:14:25,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:14:25,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:14:25,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:14:25,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:14:25,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:14:25,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:14:25,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:14:25,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:14:25,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:14:25,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:14:25,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:14:25,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:14:25,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:14:25,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:14:25,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:14:25,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:14:25,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:14:25,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:14:25,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:14:25,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:14:25,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:14:26,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:14:26,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:14:26,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:14:26,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:14:26,357 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:14:26,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label19.c [2020-10-12 15:14:26,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8efe7dd42/68500b52c2bb4a65b9d231f59a7ef848/FLAGc4207ae2e [2020-10-12 15:14:27,486 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:14:27,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label19.c [2020-10-12 15:14:27,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8efe7dd42/68500b52c2bb4a65b9d231f59a7ef848/FLAGc4207ae2e [2020-10-12 15:14:27,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8efe7dd42/68500b52c2bb4a65b9d231f59a7ef848 [2020-10-12 15:14:27,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:14:27,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:14:27,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:14:27,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:14:27,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:14:27,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:14:27" (1/1) ... [2020-10-12 15:14:27,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8a6f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:27, skipping insertion in model container [2020-10-12 15:14:27,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:14:27" (1/1) ... [2020-10-12 15:14:27,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:14:28,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:14:30,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:14:30,704 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:14:32,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:14:32,073 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:14:32,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32 WrapperNode [2020-10-12 15:14:32,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:14:32,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:14:32,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:14:32,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:14:32,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... [2020-10-12 15:14:32,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:14:32,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:14:32,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:14:32,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:14:32,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:14:32,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:14:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:14:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 15:14:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 15:14:32,802 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 15:14:32,802 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 15:14:32,802 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-12 15:14:32,804 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-12 15:14:32,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:14:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 15:14:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 15:14:32,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 15:14:32,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 15:14:32,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-12 15:14:32,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-12 15:14:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:14:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:14:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:14:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:14:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:14:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:14:47,037 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:14:47,037 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:14:47,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:14:47 BoogieIcfgContainer [2020-10-12 15:14:47,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:14:47,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:14:47,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:14:47,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:14:47,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:14:27" (1/3) ... [2020-10-12 15:14:47,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c46269f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:14:47, skipping insertion in model container [2020-10-12 15:14:47,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:14:32" (2/3) ... [2020-10-12 15:14:47,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c46269f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:14:47, skipping insertion in model container [2020-10-12 15:14:47,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:14:47" (3/3) ... [2020-10-12 15:14:47,068 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label19.c [2020-10-12 15:14:47,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:14:47,093 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:14:47,109 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:14:47,144 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:14:47,145 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:14:47,145 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:14:47,145 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:14:47,145 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:14:47,145 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:14:47,145 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:14:47,145 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:14:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-12 15:14:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:14:47,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:14:47,209 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] [2020-10-12 15:14:47,209 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:14:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:14:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1392046818, now seen corresponding path program 1 times [2020-10-12 15:14:47,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:14:47,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606278089] [2020-10-12 15:14:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:14:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:47,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:47,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:47,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:14:47,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:14:47,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-12 15:14:47,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:47,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:14:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:14:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:14:47,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:14:47,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:14:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:47,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:47,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:14:47,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:14:47,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:14:47,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:47,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:14:47,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:14:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:14:47,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:14:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:14:48,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606278089] [2020-10-12 15:14:48,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:14:48,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 15:14:48,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519747669] [2020-10-12 15:14:48,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:14:48,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:14:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:14:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:14:48,037 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-12 15:15:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:15:19,694 INFO L93 Difference]: Finished difference Result 5087 states and 9562 transitions. [2020-10-12 15:15:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:15:19,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-12 15:15:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:15:19,749 INFO L225 Difference]: With dead ends: 5087 [2020-10-12 15:15:19,749 INFO L226 Difference]: Without dead ends: 3246 [2020-10-12 15:15:19,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:15:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-12 15:15:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-12 15:15:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-12 15:15:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-12 15:15:20,037 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 30 [2020-10-12 15:15:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:15:20,037 INFO L479 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-12 15:15:20,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:15:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-12 15:15:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 15:15:20,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:15:20,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:15:20,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:15:20,044 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:15:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:15:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash 553086255, now seen corresponding path program 1 times [2020-10-12 15:15:20,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:15:20,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39157013] [2020-10-12 15:15:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:15:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:15:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:20,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:20,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:21,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:15:21,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 15:15:21,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:15:21,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-12 15:15:21,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:15:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:15:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:15:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 15:15:21,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 15:15:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:15:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:15:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:21,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:15:21,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:15:21,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:15:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:15:21,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:15:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:15:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:15:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:15:21,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:15:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:15:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:15:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:21,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:15:21,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:15:21,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:15:21,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:15:21,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 15:15:21,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:15:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:15:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:15:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 15:15:21,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:15:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:15:22,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39157013] [2020-10-12 15:15:22,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:15:22,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:15:22,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30722506] [2020-10-12 15:15:22,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:15:22,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:15:22,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:15:22,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:15:22,047 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 7 states. [2020-10-12 15:16:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:16:16,069 INFO L93 Difference]: Finished difference Result 9522 states and 17580 transitions. [2020-10-12 15:16:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:16:16,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-12 15:16:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:16:16,119 INFO L225 Difference]: With dead ends: 9522 [2020-10-12 15:16:16,119 INFO L226 Difference]: Without dead ends: 6349 [2020-10-12 15:16:16,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:16:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6349 states. [2020-10-12 15:16:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6349 to 6240. [2020-10-12 15:16:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6240 states. [2020-10-12 15:16:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 9742 transitions. [2020-10-12 15:16:16,467 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 9742 transitions. Word has length 101 [2020-10-12 15:16:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:16:16,468 INFO L479 AbstractCegarLoop]: Abstraction has 6240 states and 9742 transitions. [2020-10-12 15:16:16,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:16:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 9742 transitions. [2020-10-12 15:16:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 15:16:16,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:16:16,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:16:16,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:16:16,473 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:16:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:16:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash -436665375, now seen corresponding path program 1 times [2020-10-12 15:16:16,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:16:16,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660131895] [2020-10-12 15:16:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:16:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:16:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:16:16,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:16:17,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:16:17,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 15:16:17,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:16:17,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-12 15:16:17,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:16:17,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:16:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:16:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 15:16:17,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:16:17,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:16:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:16:17,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:16:17,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:16:17,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:16:17,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:16:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:16:17,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:16:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:16:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:16:17,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:16:17,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:16:17,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:16:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:16:17,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:16:17,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:16:17,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 15:16:17,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:16:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-12 15:16:17,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:16:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:16:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:16:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 15:16:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:16:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:16:18,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660131895] [2020-10-12 15:16:18,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:16:18,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:16:18,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756904953] [2020-10-12 15:16:18,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:16:18,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:16:18,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:16:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:16:18,042 INFO L87 Difference]: Start difference. First operand 6240 states and 9742 transitions. Second operand 7 states. [2020-10-12 15:17:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:17:08,470 INFO L93 Difference]: Finished difference Result 15849 states and 25102 transitions. [2020-10-12 15:17:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:17:08,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-12 15:17:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:17:08,533 INFO L225 Difference]: With dead ends: 15849 [2020-10-12 15:17:08,533 INFO L226 Difference]: Without dead ends: 9615 [2020-10-12 15:17:08,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:17:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2020-10-12 15:17:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 9352. [2020-10-12 15:17:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9352 states. [2020-10-12 15:17:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9352 states to 9352 states and 13719 transitions. [2020-10-12 15:17:08,855 INFO L78 Accepts]: Start accepts. Automaton has 9352 states and 13719 transitions. Word has length 108 [2020-10-12 15:17:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:17:08,855 INFO L479 AbstractCegarLoop]: Abstraction has 9352 states and 13719 transitions. [2020-10-12 15:17:08,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:17:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9352 states and 13719 transitions. [2020-10-12 15:17:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 15:17:08,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:17:08,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:17:08,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:17:08,869 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:17:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:17:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -48124653, now seen corresponding path program 1 times [2020-10-12 15:17:08,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:17:08,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468226405] [2020-10-12 15:17:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:17:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:08,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:09,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:09,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:10,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:10,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 15:17:10,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:17:10,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1643 [2020-10-12 15:17:10,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:17:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:17:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 15:17:10,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:17:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:17:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:10,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:10,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:10,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:17:10,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:17:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:17:10,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:10,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:17:10,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:17:10,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:17:10,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:17:10,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:17:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:10,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:10,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:11,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:11,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 15:17:11,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:17:11,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-12 15:17:11,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:11,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:17:11,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:17:11,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 15:17:11,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:17:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:17:11,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468226405] [2020-10-12 15:17:11,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:17:11,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:17:11,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470107752] [2020-10-12 15:17:11,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:17:11,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:17:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:17:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:17:11,210 INFO L87 Difference]: Start difference. First operand 9352 states and 13719 transitions. Second operand 7 states. [2020-10-12 15:18:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:18:20,753 INFO L93 Difference]: Finished difference Result 28348 states and 43198 transitions. [2020-10-12 15:18:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:18:20,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-10-12 15:18:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:18:20,843 INFO L225 Difference]: With dead ends: 28348 [2020-10-12 15:18:20,843 INFO L226 Difference]: Without dead ends: 19002 [2020-10-12 15:18:20,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:18:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19002 states. [2020-10-12 15:18:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19002 to 18485. [2020-10-12 15:18:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18485 states. [2020-10-12 15:18:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18485 states to 18485 states and 25765 transitions. [2020-10-12 15:18:21,395 INFO L78 Accepts]: Start accepts. Automaton has 18485 states and 25765 transitions. Word has length 116 [2020-10-12 15:18:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:18:21,395 INFO L479 AbstractCegarLoop]: Abstraction has 18485 states and 25765 transitions. [2020-10-12 15:18:21,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:18:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 18485 states and 25765 transitions. [2020-10-12 15:18:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-12 15:18:21,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:18:21,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:18:21,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:18:21,402 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:18:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:18:21,403 INFO L82 PathProgramCache]: Analyzing trace with hash 394074117, now seen corresponding path program 1 times [2020-10-12 15:18:21,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:18:21,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180154983] [2020-10-12 15:18:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:18:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:18:21,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:22,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:18:22,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 15:18:22,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:18:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-12 15:18:22,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:18:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:18:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:18:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-12 15:18:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:18:22,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:18:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:18:22,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:23,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:18:23,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:18:23,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:18:23,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:18:23,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:18:23,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:18:23,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:18:23,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:18:23,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:18:23,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:18:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:18:23,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:23,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:18:23,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-12 15:18:23,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:18:23,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-12 15:18:23,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:18:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:18:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:18:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-12 15:18:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:18:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:18:23,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180154983] [2020-10-12 15:18:23,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:18:23,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:18:23,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291743991] [2020-10-12 15:18:23,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:18:23,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:18:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:18:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:18:23,531 INFO L87 Difference]: Start difference. First operand 18485 states and 25765 transitions. Second operand 7 states.