/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:27,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:27,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:27,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:27,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:27,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:27,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:27,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:27,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:27,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:27,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:27,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:27,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:27,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:27,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:27,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:27,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:27,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:27,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:27,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:27,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:27,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:27,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:27,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:27,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:27,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:27,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:27,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:27,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:27,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 21:43:27,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:27,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:27,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:27,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:43:27,855 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:27,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:27,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:27,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:27,857 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:27,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:27,858 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:27,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:27,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:27,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:27,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:27,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:27,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:27,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:27,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:27,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:27,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:27,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:27,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:27,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:27,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:27,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:27,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:27,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:27,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:27,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:27,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:27,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:27,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:27,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:43:28,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:28,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:28,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:28,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:28,331 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:28,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label47.c [2020-09-24 21:43:28,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e247e5eb/2792ec51cf0f4104becc0be1350b4eb7/FLAG2e08f18c9 [2020-09-24 21:43:29,054 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:29,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label47.c [2020-09-24 21:43:29,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e247e5eb/2792ec51cf0f4104becc0be1350b4eb7/FLAG2e08f18c9 [2020-09-24 21:43:29,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e247e5eb/2792ec51cf0f4104becc0be1350b4eb7 [2020-09-24 21:43:29,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:29,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:29,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:29,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:29,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:29,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:29" (1/1) ... [2020-09-24 21:43:29,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763ad0aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:29, skipping insertion in model container [2020-09-24 21:43:29,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:29" (1/1) ... [2020-09-24 21:43:29,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:29,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:29,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:29,986 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:30,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:30,115 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:30,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30 WrapperNode [2020-09-24 21:43:30,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:30,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:30,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:30,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:30,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... [2020-09-24 21:43:30,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:30,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:30,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:30,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:30,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:30,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:30,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:30,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:30,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:30,333 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:30,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:30,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:30,334 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:30,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:30,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:30,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:31,591 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:31,592 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:31,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:31 BoogieIcfgContainer [2020-09-24 21:43:31,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:31,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:31,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:31,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:31,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:29" (1/3) ... [2020-09-24 21:43:31,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6fae65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:31, skipping insertion in model container [2020-09-24 21:43:31,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:30" (2/3) ... [2020-09-24 21:43:31,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6fae65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:31, skipping insertion in model container [2020-09-24 21:43:31,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:31" (3/3) ... [2020-09-24 21:43:31,611 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label47.c [2020-09-24 21:43:31,623 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:31,634 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:31,657 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:31,690 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:31,691 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:31,691 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:31,691 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:31,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:31,691 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:31,691 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:31,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 21:43:31,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:31,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:31,749 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1682076970, now seen corresponding path program 1 times [2020-09-24 21:43:31,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:31,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143623590] [2020-09-24 21:43:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:37,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:37,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-24 21:43:37,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:43:37,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 21:43:37,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:37,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:43:37,705 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:38,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:38,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:38,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:38,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:38,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-24 21:43:38,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:38,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:38,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:38,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:38,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:38,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143623590] [2020-09-24 21:43:38,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:38,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:38,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854611629] [2020-09-24 21:43:38,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:38,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:38,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:38,761 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:39,310 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:39,603 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:43:39,865 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:43:40,541 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:43:41,049 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:43:42,229 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:43:42,448 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:43:42,826 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:43:43,629 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:43:44,128 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:43:44,326 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:43:45,429 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:43:45,868 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:43:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:48,517 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:43:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:48,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 133 [2020-09-24 21:43:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:48,555 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:43:48,555 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:43:48,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:43:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:43:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:43:48,700 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 133 [2020-09-24 21:43:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:48,701 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:43:48,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:43:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 21:43:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:48,714 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-24 21:43:48,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:48,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2099256184, now seen corresponding path program 1 times [2020-09-24 21:43:48,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:48,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672849964] [2020-09-24 21:43:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:51,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:52,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:53,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:53,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-09-24 21:43:53,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:53,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:43:53,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:53,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:54,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:54,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:54,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:54,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:54,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:54,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:43:54,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:54,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:54,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:54,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:54,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:54,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:54,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:54,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:54,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:54,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:54,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 21:43:54,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:54,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:54,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:54,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:55,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672849964] [2020-09-24 21:43:55,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:55,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:55,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392507434] [2020-09-24 21:43:55,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:55,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:55,382 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 19 states. [2020-09-24 21:43:56,237 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-09-24 21:43:56,514 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-09-24 21:43:56,993 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-09-24 21:43:57,270 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-09-24 21:43:57,488 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-09-24 21:43:58,155 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-09-24 21:43:58,416 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-09-24 21:43:58,796 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-09-24 21:43:58,957 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-09-24 21:43:59,250 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-09-24 21:43:59,546 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-09-24 21:44:00,435 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-09-24 21:44:01,110 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-09-24 21:44:01,545 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-09-24 21:44:02,456 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-09-24 21:44:03,043 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-09-24 21:44:03,488 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-09-24 21:44:03,915 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-09-24 21:44:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:05,876 INFO L93 Difference]: Finished difference Result 4104 states and 5489 transitions. [2020-09-24 21:44:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:44:05,877 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 155 [2020-09-24 21:44:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:05,902 INFO L225 Difference]: With dead ends: 4104 [2020-09-24 21:44:05,903 INFO L226 Difference]: Without dead ends: 3108 [2020-09-24 21:44:05,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=618, Invalid=1544, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:44:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2020-09-24 21:44:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 3030. [2020-09-24 21:44:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3030 states. [2020-09-24 21:44:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 3677 transitions. [2020-09-24 21:44:06,066 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 3677 transitions. Word has length 155 [2020-09-24 21:44:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:06,067 INFO L479 AbstractCegarLoop]: Abstraction has 3030 states and 3677 transitions. [2020-09-24 21:44:06,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:44:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 3677 transitions. [2020-09-24 21:44:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 21:44:06,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:06,084 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-09-24 21:44:06,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:06,085 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:06,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:06,085 INFO L82 PathProgramCache]: Analyzing trace with hash 317032317, now seen corresponding path program 1 times [2020-09-24 21:44:06,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:06,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993860545] [2020-09-24 21:44:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:06,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:06,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:10,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:11,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-24 21:44:11,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:44:11,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:44:11,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:11,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:11,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:11,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:11,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:44:11,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:11,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:11,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:11,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:11,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:11,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:11,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:11,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:11,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:44:11,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:11,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:11,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:11,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:11,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:11,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:11,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:44:11,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:11,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:11,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:44:12,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993860545] [2020-09-24 21:44:12,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:12,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:44:12,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201803703] [2020-09-24 21:44:12,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:44:12,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:44:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:44:12,113 INFO L87 Difference]: Start difference. First operand 3030 states and 3677 transitions. Second operand 12 states. [2020-09-24 21:44:12,862 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-09-24 21:44:13,104 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-24 21:44:13,584 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-09-24 21:44:13,746 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-09-24 21:44:15,707 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-09-24 21:44:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:18,550 INFO L93 Difference]: Finished difference Result 8668 states and 11490 transitions. [2020-09-24 21:44:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:44:18,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 168 [2020-09-24 21:44:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:18,581 INFO L225 Difference]: With dead ends: 8668 [2020-09-24 21:44:18,581 INFO L226 Difference]: Without dead ends: 5368 [2020-09-24 21:44:18,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:44:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2020-09-24 21:44:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 4728. [2020-09-24 21:44:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4728 states. [2020-09-24 21:44:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 5854 transitions. [2020-09-24 21:44:18,758 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 5854 transitions. Word has length 168 [2020-09-24 21:44:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:18,758 INFO L479 AbstractCegarLoop]: Abstraction has 4728 states and 5854 transitions. [2020-09-24 21:44:18,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:44:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 5854 transitions. [2020-09-24 21:44:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-24 21:44:18,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:18,774 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:44:18,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:18,775 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash -675702865, now seen corresponding path program 1 times [2020-09-24 21:44:18,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:18,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111315079] [2020-09-24 21:44:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:18,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking...