/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=NARROWEST --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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:03:35,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:03:35,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:03:35,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:03:35,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:03:35,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:03:35,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:03:35,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:03:35,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:03:35,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:03:35,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:03:35,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:03:35,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:03:35,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:03:35,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:03:35,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:03:35,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:03:35,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:03:35,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:03:35,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:03:35,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:03:35,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:03:35,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:03:35,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:03:35,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:03:35,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:03:35,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:03:35,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:03:35,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:03:35,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:03:35,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:03:35,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:03:35,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:03:35,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:03:35,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:03:35,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:03:35,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:03:35,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:03:35,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:03:35,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:03:35,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:03:35,659 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 [2020-10-13 10:03:35,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:03:35,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:03:35,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:03:35,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:03:35,709 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:03:35,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:03:35,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:03:35,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:03:35,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:03:35,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:03:35,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:03:35,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:03:35,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:03:35,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:03:35,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:03:35,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:03:35,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:03:35,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:03:35,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:03:35,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:03:35,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:03:35,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:03:35,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:03:35,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:03:35,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:03:35,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:03:35,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:03:35,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:03:35,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:03:35,715 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:03:36,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:03:36,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:03:36,078 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:03:36,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:03:36,081 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:03:36,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label27.c [2020-10-13 10:03:36,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f37494de6/b66b26b16c1645919934f694dc2664cd/FLAG9c2a9f346 [2020-10-13 10:03:37,159 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:03:37,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label27.c [2020-10-13 10:03:37,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f37494de6/b66b26b16c1645919934f694dc2664cd/FLAG9c2a9f346 [2020-10-13 10:03:37,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f37494de6/b66b26b16c1645919934f694dc2664cd [2020-10-13 10:03:37,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:03:37,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:03:37,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:03:37,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:03:37,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:03:37,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:03:37" (1/1) ... [2020-10-13 10:03:37,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485dcc1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:37, skipping insertion in model container [2020-10-13 10:03:37,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:03:37" (1/1) ... [2020-10-13 10:03:37,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:03:37,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:03:40,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:03:40,268 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:03:41,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:03:41,551 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:03:41,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41 WrapperNode [2020-10-13 10:03:41,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:03:41,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:03:41,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:03:41,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:03:41,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:41,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:41,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:41,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:41,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:41,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:41,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (1/1) ... [2020-10-13 10:03:42,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:03:42,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:03:42,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:03:42,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:03:42,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (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 [2020-10-13 10:03:42,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:03:42,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:03:42,381 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:03:42,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:03:42,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:03:42,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:03:42,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:03:42,385 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:03:42,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:03:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:03:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:03:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:03:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:03:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:03:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:03:42,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:03:42,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:03:42,390 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:03:42,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:03:42,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:03:42,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:03:55,948 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:03:55,949 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:03:55,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:03:55 BoogieIcfgContainer [2020-10-13 10:03:55,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:03:55,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:03:55,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:03:55,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:03:55,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:03:37" (1/3) ... [2020-10-13 10:03:55,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73503ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:03:55, skipping insertion in model container [2020-10-13 10:03:55,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:03:41" (2/3) ... [2020-10-13 10:03:55,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73503ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:03:55, skipping insertion in model container [2020-10-13 10:03:55,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:03:55" (3/3) ... [2020-10-13 10:03:55,980 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label27.c [2020-10-13 10:03:55,994 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:03:56,006 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:03:56,025 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:03:56,066 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:03:56,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:03:56,067 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:03:56,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:03:56,067 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:03:56,067 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:03:56,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:03:56,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:03:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:03:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:03:56,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:56,133 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] [2020-10-13 10:03:56,133 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1728106772, now seen corresponding path program 1 times [2020-10-13 10:03:56,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:56,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122025231] [2020-10-13 10:03:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:56,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:56,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:56,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:03:56,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:56,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-13 10:03:56,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:03:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:03:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:03:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:03:56,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:56,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:56,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:56,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:56,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:56,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:03:56,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:03:56,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:03:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:57,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122025231] [2020-10-13 10:03:57,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:03:57,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:03:57,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799541216] [2020-10-13 10:03:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:03:57,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:03:57,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:03:57,037 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:04:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:23,546 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-13 10:04:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:04:23,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-13 10:04:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:23,617 INFO L225 Difference]: With dead ends: 5031 [2020-10-13 10:04:23,618 INFO L226 Difference]: Without dead ends: 3190 [2020-10-13 10:04:23,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:04:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-13 10:04:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-13 10:04:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-13 10:04:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-13 10:04:23,923 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 33 [2020-10-13 10:04:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:23,924 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-13 10:04:23,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:04:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-13 10:04:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:04:23,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:23,931 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, 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] [2020-10-13 10:04:23,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:04:23,932 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash -885940917, now seen corresponding path program 1 times [2020-10-13 10:04:23,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:23,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728609649] [2020-10-13 10:04:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:24,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:24,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:25,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:26,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:26,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:26,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:26,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:04:26,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:04:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2705 [2020-10-13 10:04:26,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:26,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:26,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:04:26,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:04:26,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:26,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:04:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:26,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:26,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:26,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:04:26,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:04:26,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:04:26,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:04:26,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:26,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:04:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:26,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:26,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:26,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:04:26,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:26,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-13 10:04:26,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:04:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:04:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:04:27,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728609649] [2020-10-13 10:04:27,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:04:27,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:04:27,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145383049] [2020-10-13 10:04:27,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:04:27,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:04:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:04:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:04:27,016 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 5 states. [2020-10-13 10:05:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:05:05,177 INFO L93 Difference]: Finished difference Result 9218 states and 14512 transitions. [2020-10-13 10:05:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:05:05,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-13 10:05:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:05:05,209 INFO L225 Difference]: With dead ends: 9218 [2020-10-13 10:05:05,209 INFO L226 Difference]: Without dead ends: 6040 [2020-10-13 10:05:05,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-10-13 10:05:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6024. [2020-10-13 10:05:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:05:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8357 transitions. [2020-10-13 10:05:05,355 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8357 transitions. Word has length 106 [2020-10-13 10:05:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:05:05,356 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8357 transitions. [2020-10-13 10:05:05,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:05:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8357 transitions. [2020-10-13 10:05:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:05:05,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:05:05,359 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, 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] [2020-10-13 10:05:05,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:05:05,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:05:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:05:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash -611181303, now seen corresponding path program 1 times [2020-10-13 10:05:05,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:05:05,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062301231] [2020-10-13 10:05:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:05:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:05,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:05,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:06,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:06,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:05:06,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:05:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-13 10:05:06,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:05:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:05:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:05:06,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:06,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:05:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:06,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:06,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:06,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:05:06,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:05:06,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:06,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:05:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:06,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:06,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:06,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:05:06,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 10:05:06,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:05:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:05:06,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:05:06,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062301231] [2020-10-13 10:05:06,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:05:06,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:05:06,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775495627] [2020-10-13 10:05:06,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:05:06,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:05:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:05:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:06,627 INFO L87 Difference]: Start difference. First operand 6024 states and 8357 transitions. Second operand 6 states. [2020-10-13 10:05:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:05:56,083 INFO L93 Difference]: Finished difference Result 19106 states and 27692 transitions. [2020-10-13 10:05:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:05:56,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2020-10-13 10:05:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:05:56,149 INFO L225 Difference]: With dead ends: 19106 [2020-10-13 10:05:56,150 INFO L226 Difference]: Without dead ends: 13088 [2020-10-13 10:05:56,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:05:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2020-10-13 10:05:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11685. [2020-10-13 10:05:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11685 states. [2020-10-13 10:05:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11685 states to 11685 states and 16013 transitions. [2020-10-13 10:05:56,536 INFO L78 Accepts]: Start accepts. Automaton has 11685 states and 16013 transitions. Word has length 106 [2020-10-13 10:05:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:05:56,539 INFO L479 AbstractCegarLoop]: Abstraction has 11685 states and 16013 transitions. [2020-10-13 10:05:56,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:05:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 11685 states and 16013 transitions. [2020-10-13 10:05:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 10:05:56,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:05:56,562 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, 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] [2020-10-13 10:05:56,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:05:56,563 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:05:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:05:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2143758127, now seen corresponding path program 1 times [2020-10-13 10:05:56,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:05:56,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879696097] [2020-10-13 10:05:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:05:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:56,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:56,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:57,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:57,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 10:05:57,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:05:57,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-13 10:05:57,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:57,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:05:57,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 144 [2020-10-13 10:05:57,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:05:57,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:58,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:05:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:58,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:58,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:05:58,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:58,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:05:58,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:58,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:05:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:58,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:58,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:05:58,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:58,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 10:05:58,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:05:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-13 10:05:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:05:58,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879696097] [2020-10-13 10:05:58,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:05:58,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:05:58,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138792140] [2020-10-13 10:05:58,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:05:58,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:05:58,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:05:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:05:58,583 INFO L87 Difference]: Start difference. First operand 11685 states and 16013 transitions. Second operand 5 states. [2020-10-13 10:06:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:06:33,445 INFO L93 Difference]: Finished difference Result 23396 states and 32078 transitions. [2020-10-13 10:06:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:06:33,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-13 10:06:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:06:33,498 INFO L225 Difference]: With dead ends: 23396 [2020-10-13 10:06:33,498 INFO L226 Difference]: Without dead ends: 11689 [2020-10-13 10:06:33,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:06:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11689 states. [2020-10-13 10:06:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11689 to 11685. [2020-10-13 10:06:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11685 states. [2020-10-13 10:06:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11685 states to 11685 states and 16007 transitions. [2020-10-13 10:06:33,860 INFO L78 Accepts]: Start accepts. Automaton has 11685 states and 16007 transitions. Word has length 167 [2020-10-13 10:06:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:06:33,863 INFO L479 AbstractCegarLoop]: Abstraction has 11685 states and 16007 transitions. [2020-10-13 10:06:33,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:06:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 11685 states and 16007 transitions. [2020-10-13 10:06:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 10:06:33,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:06:33,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:06:33,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:06:33,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:06:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:06:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1203444456, now seen corresponding path program 1 times [2020-10-13 10:06:33,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:06:33,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868225249] [2020-10-13 10:06:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:06:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:33,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:34,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:36,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:38,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:38,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 10:06:38,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:06:38,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:06:38,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:06:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:06:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:06:38,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:39,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:06:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:39,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:39,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:06:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:06:39,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:06:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:39,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:06:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:39,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:06:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:39,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:39,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:39,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:06:39,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:39,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 10:06:39,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:39,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:39,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:39,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:06:39,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:39,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 10:06:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:39,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:39,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:39,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:06:39,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:06:39,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-13 10:06:39,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:06:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:06:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:06:39,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:06:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:06:39,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868225249] [2020-10-13 10:06:39,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:06:39,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:06:39,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868978434] [2020-10-13 10:06:39,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:06:39,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:06:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:06:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:06:39,796 INFO L87 Difference]: Start difference. First operand 11685 states and 16007 transitions. Second operand 7 states.