/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:14:59,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:14:59,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:14:59,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:14:59,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:14:59,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:14:59,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:14:59,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:14:59,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:14:59,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:14:59,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:14:59,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:14:59,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:14:59,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:14:59,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:14:59,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:14:59,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:14:59,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:14:59,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:14:59,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:14:59,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:14:59,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:14:59,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:14:59,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:14:59,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:14:59,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:14:59,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:14:59,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:14:59,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:14:59,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:14:59,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:14:59,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:14:59,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:14:59,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:14:59,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:14:59,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:14:59,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:14:59,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:14:59,520 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:14:59,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:14:59,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:14:59,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:14:59,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:14:59,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:14:59,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:14:59,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:14:59,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:14:59,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:14:59,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:14:59,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:14:59,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:14:59,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:14:59,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:14:59,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:14:59,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:14:59,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:14:59,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:14:59,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:14:59,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:14:59,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:14:59,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:14:59,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:14:59,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:14:59,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:14:59,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:15:00,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:15:00,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:15:00,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:15:00,030 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:15:00,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label38.c [2020-10-27 00:15:00,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/511dd851b/bb4058d88a984573bdd02af295748914/FLAG079e388c5 [2020-10-27 00:15:01,101 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:15:01,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label38.c [2020-10-27 00:15:01,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/511dd851b/bb4058d88a984573bdd02af295748914/FLAG079e388c5 [2020-10-27 00:15:01,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/511dd851b/bb4058d88a984573bdd02af295748914 [2020-10-27 00:15:01,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:15:01,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:15:01,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:15:01,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:15:01,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:15:01,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:15:01" (1/1) ... [2020-10-27 00:15:01,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6bf695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:01, skipping insertion in model container [2020-10-27 00:15:01,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:15:01" (1/1) ... [2020-10-27 00:15:01,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:15:01,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:15:03,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:15:03,031 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:15:03,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:15:03,564 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:15:03,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03 WrapperNode [2020-10-27 00:15:03,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:15:03,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:15:03,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:15:03,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:15:03,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... [2020-10-27 00:15:03,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:15:03,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:15:03,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:15:03,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:15:03,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:15:03,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:15:03,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:15:03,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:15:03,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:15:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:15:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:15:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:15:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:15:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:15:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:15:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:15:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:15:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:15:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:15:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:15:13,276 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:15:13,277 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:15:13,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:15:13 BoogieIcfgContainer [2020-10-27 00:15:13,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:15:13,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:15:13,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:15:13,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:15:13,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:15:01" (1/3) ... [2020-10-27 00:15:13,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340555a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:15:13, skipping insertion in model container [2020-10-27 00:15:13,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:03" (2/3) ... [2020-10-27 00:15:13,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340555a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:15:13, skipping insertion in model container [2020-10-27 00:15:13,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:15:13" (3/3) ... [2020-10-27 00:15:13,299 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label38.c [2020-10-27 00:15:13,318 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:15:13,325 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:15:13,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:15:13,391 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:15:13,392 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:15:13,392 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:15:13,392 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:15:13,392 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:15:13,392 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:15:13,392 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:15:13,393 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:15:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:15:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 00:15:13,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:13,452 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] [2020-10-27 00:15:13,453 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1118139227, now seen corresponding path program 1 times [2020-10-27 00:15:13,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:13,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587732290] [2020-10-27 00:15:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:13,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:14,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:14,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 00:15:14,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-27 00:15:14,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:14,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:15:14,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:14,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 00:15:14,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:15:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:14,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:14,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:14,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:14,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 00:15:14,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:15:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:15:14,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587732290] [2020-10-27 00:15:14,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:15:14,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:15:14,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715819913] [2020-10-27 00:15:14,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:15:14,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:14,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:15:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:15:14,849 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 5 states. [2020-10-27 00:15:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:31,454 INFO L93 Difference]: Finished difference Result 2174 states and 4022 transitions. [2020-10-27 00:15:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:15:31,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 00:15:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:31,497 INFO L225 Difference]: With dead ends: 2174 [2020-10-27 00:15:31,498 INFO L226 Difference]: Without dead ends: 1473 [2020-10-27 00:15:31,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:15:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-10-27 00:15:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1444. [2020-10-27 00:15:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-10-27 00:15:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2113 transitions. [2020-10-27 00:15:31,723 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2113 transitions. Word has length 59 [2020-10-27 00:15:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:31,726 INFO L481 AbstractCegarLoop]: Abstraction has 1444 states and 2113 transitions. [2020-10-27 00:15:31,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:15:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2113 transitions. [2020-10-27 00:15:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 00:15:31,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:31,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:15:31,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:15:31,746 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1125970598, now seen corresponding path program 1 times [2020-10-27 00:15:31,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:31,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337215236] [2020-10-27 00:15:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:31,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:32,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:33,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:33,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 00:15:33,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:15:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-27 00:15:33,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:15:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-27 00:15:33,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:15:33,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:33,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:33,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:33,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:15:33,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:15:33,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:34,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:34,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:34,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:15:34,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:34,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-27 00:15:34,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:34,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:15:34,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:15:34,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337215236] [2020-10-27 00:15:34,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:34,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:15:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037394801] [2020-10-27 00:15:34,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:15:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:15:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:15:34,574 INFO L87 Difference]: Start difference. First operand 1444 states and 2113 transitions. Second operand 7 states. [2020-10-27 00:15:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:53,083 INFO L93 Difference]: Finished difference Result 2909 states and 4257 transitions. [2020-10-27 00:15:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:15:53,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-27 00:15:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:53,095 INFO L225 Difference]: With dead ends: 2909 [2020-10-27 00:15:53,095 INFO L226 Difference]: Without dead ends: 1471 [2020-10-27 00:15:53,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:15:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2020-10-27 00:15:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1460. [2020-10-27 00:15:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-10-27 00:15:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2033 transitions. [2020-10-27 00:15:53,152 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2033 transitions. Word has length 130 [2020-10-27 00:15:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:53,153 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2033 transitions. [2020-10-27 00:15:53,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:15:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2033 transitions. [2020-10-27 00:15:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 00:15:53,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:53,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:15:53,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:15:53,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1237491023, now seen corresponding path program 1 times [2020-10-27 00:15:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:53,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368999104] [2020-10-27 00:15:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:54,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 00:15:54,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:54,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-27 00:15:54,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:54,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:15:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:15:54,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:54,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:54,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:54,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:15:54,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:54,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:54,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:54,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:54,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:15:54,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 00:15:54,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:15:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:15:54,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:15:55,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368999104] [2020-10-27 00:15:55,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:55,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:55,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557096792] [2020-10-27 00:15:55,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:15:55,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:15:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:15:55,060 INFO L87 Difference]: Start difference. First operand 1460 states and 2033 transitions. Second operand 8 states. [2020-10-27 00:16:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:13,986 INFO L93 Difference]: Finished difference Result 3508 states and 5275 transitions. [2020-10-27 00:16:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:16:13,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-10-27 00:16:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:14,006 INFO L225 Difference]: With dead ends: 3508 [2020-10-27 00:16:14,006 INFO L226 Difference]: Without dead ends: 2438 [2020-10-27 00:16:14,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:16:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2020-10-27 00:16:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2391. [2020-10-27 00:16:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2391 states. [2020-10-27 00:16:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3349 transitions. [2020-10-27 00:16:14,127 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3349 transitions. Word has length 133 [2020-10-27 00:16:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:14,128 INFO L481 AbstractCegarLoop]: Abstraction has 2391 states and 3349 transitions. [2020-10-27 00:16:14,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:16:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3349 transitions. [2020-10-27 00:16:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 00:16:14,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:14,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:14,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:16:14,133 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2101879799, now seen corresponding path program 1 times [2020-10-27 00:16:14,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:14,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666380945] [2020-10-27 00:16:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:15,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 00:16:16,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:16:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1801 [2020-10-27 00:16:16,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:16:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:16:16,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:16,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:16,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:16,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:16:16,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:16,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:16:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:16,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:16,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 00:16:16,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:16,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:16,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:16,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:16:16,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 00:16:16,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:16:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:16:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 115 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:16:16,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666380945] [2020-10-27 00:16:16,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:16,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:16:16,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023938198] [2020-10-27 00:16:16,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:16:16,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:16:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:16:16,797 INFO L87 Difference]: Start difference. First operand 2391 states and 3349 transitions. Second operand 6 states. [2020-10-27 00:16:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:34,978 INFO L93 Difference]: Finished difference Result 5357 states and 8150 transitions. [2020-10-27 00:16:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:16:34,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 215 [2020-10-27 00:16:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:35,005 INFO L225 Difference]: With dead ends: 5357 [2020-10-27 00:16:35,005 INFO L226 Difference]: Without dead ends: 3405 [2020-10-27 00:16:35,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:16:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3405 states. [2020-10-27 00:16:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3405 to 3363. [2020-10-27 00:16:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3363 states. [2020-10-27 00:16:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4652 transitions. [2020-10-27 00:16:35,112 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4652 transitions. Word has length 215 [2020-10-27 00:16:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:35,113 INFO L481 AbstractCegarLoop]: Abstraction has 3363 states and 4652 transitions. [2020-10-27 00:16:35,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:16:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4652 transitions. [2020-10-27 00:16:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 00:16:35,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:35,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:35,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:16:35,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:35,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:35,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1381999642, now seen corresponding path program 1 times [2020-10-27 00:16:35,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:35,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203780581] [2020-10-27 00:16:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:36,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 00:16:36,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-27 00:16:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:16:36,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:36,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:36,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:36,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:36,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:36,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:16:36,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:36,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:36,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:36,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:36,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:36,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:36,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:36,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:36,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:36,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 00:16:36,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:36,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:36,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:37,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:37,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:16:37,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:37,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 00:16:37,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:37,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 00:16:37,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:16:37,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203780581] [2020-10-27 00:16:37,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:37,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:16:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221090819] [2020-10-27 00:16:37,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:16:37,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:16:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:16:37,138 INFO L87 Difference]: Start difference. First operand 3363 states and 4652 transitions. Second operand 7 states. [2020-10-27 00:16:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:57,177 INFO L93 Difference]: Finished difference Result 9151 states and 13542 transitions. [2020-10-27 00:16:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:16:57,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 216 [2020-10-27 00:16:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:57,220 INFO L225 Difference]: With dead ends: 9151 [2020-10-27 00:16:57,220 INFO L226 Difference]: Without dead ends: 6227 [2020-10-27 00:16:57,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:16:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6227 states. [2020-10-27 00:16:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6227 to 6155. [2020-10-27 00:16:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6155 states. [2020-10-27 00:16:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6155 states to 6155 states and 8405 transitions. [2020-10-27 00:16:57,441 INFO L78 Accepts]: Start accepts. Automaton has 6155 states and 8405 transitions. Word has length 216 [2020-10-27 00:16:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:57,442 INFO L481 AbstractCegarLoop]: Abstraction has 6155 states and 8405 transitions. [2020-10-27 00:16:57,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:16:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6155 states and 8405 transitions. [2020-10-27 00:16:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-27 00:16:57,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:57,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:57,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:16:57,447 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1610624605, now seen corresponding path program 1 times [2020-10-27 00:16:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:57,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839256548] [2020-10-27 00:16:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:58,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:02,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:02,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 00:17:02,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:17:02,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 00:17:02,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:17:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:17:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:02,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:02,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:02,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:02,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:17:02,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:02,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:02,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:03,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:03,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:03,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:03,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 00:17:03,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:17:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:03,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:17:03,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:03,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:03,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:03,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:17:03,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:03,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 00:17:03,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:03,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:03,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:03,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:17:03,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:17:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 103 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:17:03,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839256548] [2020-10-27 00:17:03,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:03,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:17:03,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672658517] [2020-10-27 00:17:03,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:17:03,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:03,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:17:03,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:17:03,735 INFO L87 Difference]: Start difference. First operand 6155 states and 8405 transitions. Second operand 10 states. [2020-10-27 00:17:03,935 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 00:17:08,871 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-27 00:17:11,940 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-27 00:17:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:30,076 INFO L93 Difference]: Finished difference Result 12763 states and 17646 transitions. [2020-10-27 00:17:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 00:17:30,079 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 221 [2020-10-27 00:17:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:30,120 INFO L225 Difference]: With dead ends: 12763 [2020-10-27 00:17:30,120 INFO L226 Difference]: Without dead ends: 7047 [2020-10-27 00:17:30,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-10-27 00:17:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2020-10-27 00:17:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6772. [2020-10-27 00:17:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6772 states. [2020-10-27 00:17:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 9159 transitions. [2020-10-27 00:17:30,402 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 9159 transitions. Word has length 221 [2020-10-27 00:17:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:30,403 INFO L481 AbstractCegarLoop]: Abstraction has 6772 states and 9159 transitions. [2020-10-27 00:17:30,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:17:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 9159 transitions. [2020-10-27 00:17:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 00:17:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:30,409 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:30,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:17:30,410 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1488918163, now seen corresponding path program 1 times [2020-10-27 00:17:30,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:30,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494199314] [2020-10-27 00:17:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:30,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:30,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:35,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:35,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-27 00:17:35,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:35,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 00:17:35,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:17:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 00:17:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:17:35,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:35,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:35,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:35,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:35,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:17:35,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:35,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:35,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:35,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:35,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:35,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:35,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:35,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:35,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:35,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:35,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-27 00:17:35,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:36,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:36,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:17:36,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:17:36,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 00:17:36,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:36,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:17:36,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 132 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:17:36,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494199314] [2020-10-27 00:17:36,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:36,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100118639] [2020-10-27 00:17:36,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:17:36,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:36,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:17:36,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:36,289 INFO L87 Difference]: Start difference. First operand 6772 states and 9159 transitions. Second operand 7 states. [2020-10-27 00:17:37,208 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:17:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:55,579 INFO L93 Difference]: Finished difference Result 15985 states and 23451 transitions. [2020-10-27 00:17:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:17:55,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-10-27 00:17:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:55,656 INFO L225 Difference]: With dead ends: 15985 [2020-10-27 00:17:55,657 INFO L226 Difference]: Without dead ends: 10099 [2020-10-27 00:17:55,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:17:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2020-10-27 00:17:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 9983. [2020-10-27 00:17:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9983 states. [2020-10-27 00:17:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9983 states to 9983 states and 13943 transitions. [2020-10-27 00:17:56,022 INFO L78 Accepts]: Start accepts. Automaton has 9983 states and 13943 transitions. Word has length 232 [2020-10-27 00:17:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:56,023 INFO L481 AbstractCegarLoop]: Abstraction has 9983 states and 13943 transitions. [2020-10-27 00:17:56,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:17:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 9983 states and 13943 transitions. [2020-10-27 00:17:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-27 00:17:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:56,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:56,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:17:56,030 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1482160433, now seen corresponding path program 1 times [2020-10-27 00:17:56,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:56,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492932046] [2020-10-27 00:17:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:56,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-27 00:18:01,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:18:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 00:18:01,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:01,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:01,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 00:18:01,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:01,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:01,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:01,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:18:01,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:01,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:01,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:01,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 00:18:01,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:01,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 00:18:01,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 00:18:01,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-27 00:18:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:01,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 00:18:01,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:01,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 00:18:01,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 00:18:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 102 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:18:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492932046] [2020-10-27 00:18:01,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:01,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:18:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921485764] [2020-10-27 00:18:01,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:01,963 INFO L87 Difference]: Start difference. First operand 9983 states and 13943 transitions. Second operand 7 states. [2020-10-27 00:18:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:18,769 INFO L93 Difference]: Finished difference Result 19995 states and 28479 transitions. [2020-10-27 00:18:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:18:18,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-27 00:18:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:18,805 INFO L225 Difference]: With dead ends: 19995 [2020-10-27 00:18:18,805 INFO L226 Difference]: Without dead ends: 10453 [2020-10-27 00:18:18,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:18:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10453 states. [2020-10-27 00:18:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10453 to 9090. [2020-10-27 00:18:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9090 states. [2020-10-27 00:18:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9090 states to 9090 states and 12115 transitions. [2020-10-27 00:18:19,100 INFO L78 Accepts]: Start accepts. Automaton has 9090 states and 12115 transitions. Word has length 250 [2020-10-27 00:18:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:19,100 INFO L481 AbstractCegarLoop]: Abstraction has 9090 states and 12115 transitions. [2020-10-27 00:18:19,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9090 states and 12115 transitions. [2020-10-27 00:18:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 00:18:19,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:19,108 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:19,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:18:19,109 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1091975257, now seen corresponding path program 1 times [2020-10-27 00:18:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:19,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916984457] [2020-10-27 00:18:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:19,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:19,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:21,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:24,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:24,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-27 00:18:24,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:18:24,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 00:18:24,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:24,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:18:24,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:24,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 00:18:24,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:24,431 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:18:24,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:24,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:24,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:24,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:24,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:24,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:18:24,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:24,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:24,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:24,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:24,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:24,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:24,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:24,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:24,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 00:18:24,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:18:24,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:24,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:18:24,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:24,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:24,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:24,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:18:24,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:24,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 00:18:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:18:24,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:25,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 00:18:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:25,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:25,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:25,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:18:25,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:25,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 00:18:25,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:25,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:25,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:18:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 158 proven. 216 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:18:25,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916984457] [2020-10-27 00:18:25,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:25,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:18:25,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630232868] [2020-10-27 00:18:25,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:18:25,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:18:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:18:25,261 INFO L87 Difference]: Start difference. First operand 9090 states and 12115 transitions. Second operand 10 states. [2020-10-27 00:18:25,484 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66