/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_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:34,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:34,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:34,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-24 21:41:34,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:34,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:34,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:34,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:34,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:34,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:34,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:34,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:34,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:34,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:34,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:34,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:34,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:34,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:34,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:34,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:34,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:34,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 21:41:34,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:34,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:34,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:34,750 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 21:41:34,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:34,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:34,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:34,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:34,802 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:34,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:34,803 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:34,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:34,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:34,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:34,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:34,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:34,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:34,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:34,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:34,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:34,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:34,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:34,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:34,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:34,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:34,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:34,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:34,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:34,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:34,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:34,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:34,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:34,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:34,809 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 21:41:35,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:35,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:35,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:35,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:35,276 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:35,277 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label12.c [2020-09-24 21:41:35,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22e69779a/49bf2ed8f92c4e2493ab8a08764cd184/FLAGddaeeeff3 [2020-09-24 21:41:35,986 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:35,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label12.c [2020-09-24 21:41:36,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22e69779a/49bf2ed8f92c4e2493ab8a08764cd184/FLAGddaeeeff3 [2020-09-24 21:41:36,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22e69779a/49bf2ed8f92c4e2493ab8a08764cd184 [2020-09-24 21:41:36,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:36,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:36,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:36,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:36,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:36,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:36" (1/1) ... [2020-09-24 21:41:36,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d4521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:36, skipping insertion in model container [2020-09-24 21:41:36,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:36" (1/1) ... [2020-09-24 21:41:36,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:36,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:36,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:36,922 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:37,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:37,092 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:37,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37 WrapperNode [2020-09-24 21:41:37,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:37,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:37,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:37,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:37,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (1/1) ... [2020-09-24 21:41:37,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:37,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:37,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:37,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:37,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (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 21:41:37,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:37,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:37,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:37,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:38,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:38,623 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:38,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:38 BoogieIcfgContainer [2020-09-24 21:41:38,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:38,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:38,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:38,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:38,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:36" (1/3) ... [2020-09-24 21:41:38,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663452be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:38, skipping insertion in model container [2020-09-24 21:41:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:37" (2/3) ... [2020-09-24 21:41:38,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663452be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:38, skipping insertion in model container [2020-09-24 21:41:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:38" (3/3) ... [2020-09-24 21:41:38,644 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label12.c [2020-09-24 21:41:38,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:38,671 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:38,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:38,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:38,738 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:38,738 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:38,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:38,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:38,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:38,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:38,738 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-24 21:41:38,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:38,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:38,797 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash 463353353, now seen corresponding path program 1 times [2020-09-24 21:41:38,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:38,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840226184] [2020-09-24 21:41:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:39,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:43,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:43,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:44,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:44,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-24 21:41:44,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:44,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 21:41:44,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:41:44,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:45,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:45,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:45,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:45,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-24 21:41:45,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:45,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:45,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:45,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:45,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:45,464 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 21:41:45,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840226184] [2020-09-24 21:41:45,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:45,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:45,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32261401] [2020-09-24 21:41:45,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:45,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:45,499 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:46,065 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-09-24 21:41:46,271 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:41:46,514 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-09-24 21:41:47,133 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:41:47,559 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-09-24 21:41:48,615 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-09-24 21:41:48,803 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:41:49,674 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:41:50,099 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:41:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:53,827 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:41:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:41:53,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 144 [2020-09-24 21:41:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:53,864 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:41:53,864 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:41:53,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=415, Invalid=917, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:41:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:41:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:41:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:41:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:41:54,027 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 144 [2020-09-24 21:41:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:54,028 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:41:54,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:41:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 21:41:54,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:54,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:54,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:54,041 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2100289557, now seen corresponding path program 1 times [2020-09-24 21:41:54,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:54,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214324427] [2020-09-24 21:41:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:54,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:54,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:56,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:59,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-09-24 21:41:59,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:41:59,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:41:59,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:59,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:59,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:59,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:59,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:59,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:59,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:59,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:59,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:41:59,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:59,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:59,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:59,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:59,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:59,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:59,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 21:41:59,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:59,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:59,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:42:00,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214324427] [2020-09-24 21:42:00,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:00,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:42:00,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219421841] [2020-09-24 21:42:00,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:42:00,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:42:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:42:00,123 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 20 states. [2020-09-24 21:42:00,843 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:42:01,064 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:42:01,489 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:42:01,792 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:42:02,087 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-09-24 21:42:03,185 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:42:03,460 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-09-24 21:42:03,834 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:42:04,088 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-09-24 21:42:04,897 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-09-24 21:42:06,066 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 21:42:06,453 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 21:42:08,140 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:42:09,047 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-09-24 21:42:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:11,629 INFO L93 Difference]: Finished difference Result 4755 states and 6501 transitions. [2020-09-24 21:42:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 21:42:11,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2020-09-24 21:42:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:11,660 INFO L225 Difference]: With dead ends: 4755 [2020-09-24 21:42:11,660 INFO L226 Difference]: Without dead ends: 3759 [2020-09-24 21:42:11,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=934, Invalid=2372, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 21:42:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2020-09-24 21:42:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3531. [2020-09-24 21:42:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3531 states. [2020-09-24 21:42:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4209 transitions. [2020-09-24 21:42:11,820 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4209 transitions. Word has length 166 [2020-09-24 21:42:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:11,822 INFO L479 AbstractCegarLoop]: Abstraction has 3531 states and 4209 transitions. [2020-09-24 21:42:11,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:42:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4209 transitions. [2020-09-24 21:42:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 21:42:11,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:11,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:42:11,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:42:11,839 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash -179011114, now seen corresponding path program 1 times [2020-09-24 21:42:11,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:11,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147418664] [2020-09-24 21:42:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:11,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:12,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:15,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:16,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:16,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-24 21:42:16,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:42:16,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:42:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:42:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:42:16,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:17,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:17,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:17,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:17,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:42:17,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:17,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:17,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:17,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:42:17,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:17,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:42:17,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:17,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:42:17,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:42:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:17,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:42:17,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:17,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-24 21:42:17,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:42:17,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:42:17,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147418664] [2020-09-24 21:42:17,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:17,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:42:17,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976912886] [2020-09-24 21:42:17,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:42:17,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:17,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:42:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:42:17,844 INFO L87 Difference]: Start difference. First operand 3531 states and 4209 transitions. Second operand 13 states. [2020-09-24 21:42:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:23,912 INFO L93 Difference]: Finished difference Result 9932 states and 12920 transitions. [2020-09-24 21:42:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:42:23,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 179 [2020-09-24 21:42:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:23,954 INFO L225 Difference]: With dead ends: 9932 [2020-09-24 21:42:23,955 INFO L226 Difference]: Without dead ends: 6131 [2020-09-24 21:42:23,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:42:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2020-09-24 21:42:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 5494. [2020-09-24 21:42:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5494 states. [2020-09-24 21:42:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 6813 transitions. [2020-09-24 21:42:24,168 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 6813 transitions. Word has length 179 [2020-09-24 21:42:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:24,168 INFO L479 AbstractCegarLoop]: Abstraction has 5494 states and 6813 transitions. [2020-09-24 21:42:24,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:42:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 6813 transitions. [2020-09-24 21:42:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-24 21:42:24,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:24,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:42:24,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:42:24,188 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:24,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1416172545, now seen corresponding path program 1 times [2020-09-24 21:42:24,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:24,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431929323] [2020-09-24 21:42:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:24,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:26,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking...