/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/array-fpi/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:38:22,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:38:22,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:38:22,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:38:22,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:38:22,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:38:22,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:38:22,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:38:22,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:38:22,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:38:22,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:38:22,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:38:22,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:38:22,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:38:22,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:38:22,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:38:22,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:38:22,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:38:22,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:38:22,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:38:22,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:38:22,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:38:22,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:38:22,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:38:22,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:38:22,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:38:22,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:38:22,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:38:22,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:38:22,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:38:22,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:38:22,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:38:22,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:38:22,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:38:22,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:38:22,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:38:22,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:38:22,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:38:22,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:38:22,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:38:22,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:38:22,723 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 [2020-10-26 19:38:22,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:38:22,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:38:22,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:38:22,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:38:22,783 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:38:22,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:38:22,784 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:38:22,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:38:22,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:38:22,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:38:22,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:38:22,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:38:22,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:38:22,787 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:38:22,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:38:22,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:38:22,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:38:22,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:38:22,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:38:22,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:38:22,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:38:22,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:38:22,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:38:22,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:38:22,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:38:22,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:38:22,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:38:22,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:38:22,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:38:22,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:38:23,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:38:23,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:38:23,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:38:23,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:38:23,277 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:38:23,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2020-10-26 19:38:23,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88b8d0332/48e4f69dc2404d4b8c231fb03003f57e/FLAG94167af0e [2020-10-26 19:38:23,996 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:38:23,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms1.c [2020-10-26 19:38:24,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88b8d0332/48e4f69dc2404d4b8c231fb03003f57e/FLAG94167af0e [2020-10-26 19:38:24,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88b8d0332/48e4f69dc2404d4b8c231fb03003f57e [2020-10-26 19:38:24,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:38:24,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:38:24,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:24,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:38:24,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:38:24,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115247e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24, skipping insertion in model container [2020-10-26 19:38:24,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:38:24,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:38:24,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:24,617 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:38:24,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:24,692 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:38:24,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24 WrapperNode [2020-10-26 19:38:24,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:24,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:38:24,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:38:24,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:38:24,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (1/1) ... [2020-10-26 19:38:24,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:38:24,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:38:24,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:38:24,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:38:24,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (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 [2020-10-26 19:38:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:38:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:38:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:38:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:38:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:38:24,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:38:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:38:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:38:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:38:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:38:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:38:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:38:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:38:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:38:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:38:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:38:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:38:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:38:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:38:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:38:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:38:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:38:25,287 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:38:25,288 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:38:25,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:25 BoogieIcfgContainer [2020-10-26 19:38:25,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:38:25,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:38:25,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:38:25,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:38:25,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:38:24" (1/3) ... [2020-10-26 19:38:25,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f22b6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:25, skipping insertion in model container [2020-10-26 19:38:25,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:24" (2/3) ... [2020-10-26 19:38:25,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f22b6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:25, skipping insertion in model container [2020-10-26 19:38:25,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:25" (3/3) ... [2020-10-26 19:38:25,307 INFO L111 eAbstractionObserver]: Analyzing ICFG ms1.c [2020-10-26 19:38:25,344 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:38:25,349 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:38:25,365 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:38:25,426 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:38:25,426 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:38:25,427 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:38:25,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:38:25,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:38:25,427 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:38:25,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:38:25,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:38:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-26 19:38:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:38:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:25,468 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] [2020-10-26 19:38:25,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-26 19:38:25,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:25,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119239099] [2020-10-26 19:38:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:25,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:26,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:38:26,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:26,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-26 19:38:26,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:38:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:38:26,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:38:26,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:26,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:26,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:26,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:38:26,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:26,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:26,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:26,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:26,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:26,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:26,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:26,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:38:26,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:26,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:26,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:26,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:26,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119239099] [2020-10-26 19:38:26,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:38:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671721906] [2020-10-26 19:38:26,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:38:26,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:38:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:38:26,629 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-26 19:38:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:26,847 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-26 19:38:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:38:26,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:38:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:26,858 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:38:26,858 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:38:26,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:38:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:38:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:38:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:38:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 19:38:26,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-26 19:38:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:26,912 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 19:38:26,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:38:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 19:38:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:26,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:26,914 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] [2020-10-26 19:38:26,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:38:26,915 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-26 19:38:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:26,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843327881] [2020-10-26 19:38:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:27,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:27,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:27,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-26 19:38:27,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:38:27,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 19:38:27,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:38:27,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:27,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:27,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:27,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:38:27,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:27,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:27,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:27,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:27,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:27,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:27,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:27,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:27,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843327881] [2020-10-26 19:38:27,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:27,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 19:38:27,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267037446] [2020-10-26 19:38:27,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:38:27,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:38:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:38:27,322 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-26 19:38:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:27,533 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-26 19:38:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:38:27,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-26 19:38:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:27,535 INFO L225 Difference]: With dead ends: 38 [2020-10-26 19:38:27,535 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:38:27,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:38:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-26 19:38:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:38:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 19:38:27,544 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-26 19:38:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:27,545 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 19:38:27,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:38:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 19:38:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:27,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:27,547 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] [2020-10-26 19:38:27,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:38:27,547 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:27,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-26 19:38:27,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:27,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486951449] [2020-10-26 19:38:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:28,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-26 19:38:28,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:38:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:38:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:28,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:28,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:28,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:38:28,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:28,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:28,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:28,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:28,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:28,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:28,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:28,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:28,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:28,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486951449] [2020-10-26 19:38:28,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:28,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:38:28,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403287721] [2020-10-26 19:38:28,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:38:28,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:38:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:28,770 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-26 19:38:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:29,057 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-26 19:38:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:38:29,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-26 19:38:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:29,059 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:38:29,059 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:38:29,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:38:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-26 19:38:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:38:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-26 19:38:29,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-26 19:38:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-26 19:38:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:38:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-26 19:38:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:38:29,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:29,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:29,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:38:29,070 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1079019474, now seen corresponding path program 1 times [2020-10-26 19:38:29,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:29,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900078266] [2020-10-26 19:38:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:38:30,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-26 19:38:30,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:38:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:38:30,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:30,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:38:30,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:30,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:30,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:30,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:30,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:30,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:30,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900078266] [2020-10-26 19:38:30,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:30,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:38:30,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041838184] [2020-10-26 19:38:30,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:38:30,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:30,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:38:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:30,730 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-26 19:38:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:31,241 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-26 19:38:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:38:31,243 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-26 19:38:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:31,244 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:38:31,244 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:38:31,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:38:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:38:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-26 19:38:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:38:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-26 19:38:31,259 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-10-26 19:38:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:31,259 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-26 19:38:31,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:38:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-26 19:38:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:38:31,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:31,263 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-26 19:38:31,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:38:31,264 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 2 times [2020-10-26 19:38:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:31,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116545598] [2020-10-26 19:38:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:38:36,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:38:36,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:38:36,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:38:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:38:36,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:36,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:36,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:36,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:38:36,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:36,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:36,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:36,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:36,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:36,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:36,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:36,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:36,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:36,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:36,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:36,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116545598] [2020-10-26 19:38:36,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:36,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:38:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047744825] [2020-10-26 19:38:36,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:38:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:38:36,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:38:36,697 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-26 19:38:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:37,391 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-26 19:38:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:37,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:38:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:37,394 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:38:37,394 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:38:37,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:38:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-26 19:38:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:38:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-26 19:38:37,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-26 19:38:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:37,416 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-26 19:38:37,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:38:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-26 19:38:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:38:37,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:37,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:37,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:38:37,421 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:37,421 INFO L82 PathProgramCache]: Analyzing trace with hash -639202741, now seen corresponding path program 3 times [2020-10-26 19:38:37,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:37,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748983334] [2020-10-26 19:38:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:37,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:39,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:38:39,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:39,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1930 [2020-10-26 19:38:39,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:38:39,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:39,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:39,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:39,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:39,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:39,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:39,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:39,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:39,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:39,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:39,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:39,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:39,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:39,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:39,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:39,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748983334] [2020-10-26 19:38:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:39,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059210277] [2020-10-26 19:38:39,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:39,884 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-10-26 19:38:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:40,667 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:38:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:38:40,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-26 19:38:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:40,669 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:38:40,669 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:38:40,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:38:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-26 19:38:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:38:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-26 19:38:40,684 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-26 19:38:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:40,685 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-26 19:38:40,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:38:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-26 19:38:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:38:40,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:40,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:40,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:38:40,689 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:40,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 4 times [2020-10-26 19:38:40,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:40,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46680995] [2020-10-26 19:38:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:45,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:38:45,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:38:45,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:38:45,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:38:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:46,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:46,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:46,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:46,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:46,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:46,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:46,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:46,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:46,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46680995] [2020-10-26 19:38:46,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:46,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5243804] [2020-10-26 19:38:46,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:46,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:46,098 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-26 19:38:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:47,019 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-26 19:38:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:38:47,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:38:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:47,021 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:38:47,021 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:38:47,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:38:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:38:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-26 19:38:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:38:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-26 19:38:47,029 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-26 19:38:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:47,030 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-26 19:38:47,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:38:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-26 19:38:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:38:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:47,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:47,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:38:47,032 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 5 times [2020-10-26 19:38:47,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:47,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30002374] [2020-10-26 19:38:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:47,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:50,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:38:50,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:38:50,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3668 [2020-10-26 19:38:50,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:38:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:38:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:51,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:51,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:51,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:51,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:38:51,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:51,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:51,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:51,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:51,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30002374] [2020-10-26 19:38:51,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:51,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:38:51,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546648975] [2020-10-26 19:38:51,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:38:51,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:51,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:38:51,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:38:51,628 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 23 states. [2020-10-26 19:38:53,181 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-26 19:38:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:53,986 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-26 19:38:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:38:53,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-26 19:38:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:53,992 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:38:53,992 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:38:53,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:38:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:38:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 19:38:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:38:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-26 19:38:54,002 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 42 [2020-10-26 19:38:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:54,002 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-26 19:38:54,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:38:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-26 19:38:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:38:54,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:54,003 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:54,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:38:54,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 6 times [2020-10-26 19:38:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:54,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942249146] [2020-10-26 19:38:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:54,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:38:59,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:38:59,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:38:59,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:59,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:59,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:38:59,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:59,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:59,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:59,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:59,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:59,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:59,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:59,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:59,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:59,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:59,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:59,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:59,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942249146] [2020-10-26 19:38:59,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:59,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:38:59,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257326213] [2020-10-26 19:38:59,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:38:59,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:38:59,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:38:59,495 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 19 states. [2020-10-26 19:39:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:00,512 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-26 19:39:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:39:00,513 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-26 19:39:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:00,515 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:39:00,516 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:39:00,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:39:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:39:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-26 19:39:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:39:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-26 19:39:00,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 45 [2020-10-26 19:39:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:00,526 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-26 19:39:00,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:39:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-26 19:39:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:39:00,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:00,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:00,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:39:00,528 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1091709585, now seen corresponding path program 7 times [2020-10-26 19:39:00,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:00,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803475580] [2020-10-26 19:39:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:05,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:39:05,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:39:05,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4997 [2020-10-26 19:39:05,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:05,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:39:05,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:05,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:39:05,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:39:06,447 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-26 19:39:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:06,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:06,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:06,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:06,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:06,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:06,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:06,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803475580] [2020-10-26 19:39:06,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:06,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:39:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379614772] [2020-10-26 19:39:06,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:39:06,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:39:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:39:06,962 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 24 states. [2020-10-26 19:39:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:08,504 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-26 19:39:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:39:08,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-10-26 19:39:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:08,506 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:39:08,506 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:39:08,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:39:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:39:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-26 19:39:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:39:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-26 19:39:08,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-10-26 19:39:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:08,517 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-26 19:39:08,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:39:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-26 19:39:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:39:08,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:08,518 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:08,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:39:08,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 8 times [2020-10-26 19:39:08,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:08,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929368596] [2020-10-26 19:39:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:13,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:39:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:14,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:14,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:14,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:14,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:14,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929368596] [2020-10-26 19:39:14,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:14,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:39:14,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434762876] [2020-10-26 19:39:14,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:39:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:39:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:39:14,202 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 22 states. [2020-10-26 19:39:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:15,512 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-26 19:39:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:39:15,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-26 19:39:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:15,513 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:39:15,513 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:39:15,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=458, Invalid=1612, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:39:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:39:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-26 19:39:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:39:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-26 19:39:15,529 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-26 19:39:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:15,529 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-26 19:39:15,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:39:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-26 19:39:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:39:15,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:15,532 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:15,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:39:15,532 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 9 times [2020-10-26 19:39:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:15,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133929715] [2020-10-26 19:39:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:20,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:39:20,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:39:20,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:39:20,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:39:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:20,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:39:20,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:22,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:22,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:22,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:22,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:22,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:22,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:22,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133929715] [2020-10-26 19:39:22,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:22,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:39:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124770018] [2020-10-26 19:39:22,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:39:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:39:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:39:22,138 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 31 states. [2020-10-26 19:39:23,977 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-26 19:39:24,184 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-26 19:39:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:25,739 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-26 19:39:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:39:25,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-10-26 19:39:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:25,741 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:39:25,741 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:39:25,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:39:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:39:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 19:39:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:39:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-26 19:39:25,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 52 [2020-10-26 19:39:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:25,753 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-26 19:39:25,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:39:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-26 19:39:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:39:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:25,755 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:25,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:39:25,755 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash 222645745, now seen corresponding path program 10 times [2020-10-26 19:39:25,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:25,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930920875] [2020-10-26 19:39:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:25,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:30,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:30,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:39:30,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:31,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:31,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:31,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:31,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930920875] [2020-10-26 19:39:31,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:31,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:39:31,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129435126] [2020-10-26 19:39:31,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:39:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:39:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:39:31,474 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 25 states. [2020-10-26 19:39:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:32,993 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-26 19:39:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:39:32,994 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-26 19:39:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:32,995 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:39:32,995 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:39:32,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=588, Invalid=2168, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:39:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:39:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-26 19:39:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:39:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-26 19:39:33,007 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 55 [2020-10-26 19:39:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:33,007 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-26 19:39:33,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:39:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-26 19:39:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:39:33,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:33,008 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:33,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:39:33,009 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1920102253, now seen corresponding path program 11 times [2020-10-26 19:39:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:33,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609353491] [2020-10-26 19:39:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:33,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:39:38,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:40,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:40,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:40,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:40,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:40,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:40,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:40,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:40,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:40,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:40,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609353491] [2020-10-26 19:39:40,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:40,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:39:40,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903563939] [2020-10-26 19:39:40,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:39:40,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:39:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:39:40,244 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 35 states. [2020-10-26 19:39:42,461 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2020-10-26 19:39:42,678 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-26 19:39:42,900 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-26 19:39:43,151 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-26 19:39:43,395 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-26 19:39:43,855 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-26 19:39:44,137 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-26 19:39:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:45,052 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-26 19:39:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:39:45,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 57 [2020-10-26 19:39:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:45,054 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:39:45,054 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:39:45,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:39:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:39:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-26 19:39:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:39:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-26 19:39:45,064 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2020-10-26 19:39:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:45,065 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-26 19:39:45,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:39:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-26 19:39:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:39:45,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:45,066 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:45,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:39:45,066 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash -290917340, now seen corresponding path program 12 times [2020-10-26 19:39:45,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:45,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091310625] [2020-10-26 19:39:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:45,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:39:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:50,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:50,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:50,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:50,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:50,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:50,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:50,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:50,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 25 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:50,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091310625] [2020-10-26 19:39:50,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:50,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:39:50,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024751246] [2020-10-26 19:39:50,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:39:50,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:50,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:39:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:39:50,883 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 28 states. [2020-10-26 19:39:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:52,773 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2020-10-26 19:39:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:39:52,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-26 19:39:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:52,776 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:39:52,776 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:39:52,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=734, Invalid=2806, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:39:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:39:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-26 19:39:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:39:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-26 19:39:52,787 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2020-10-26 19:39:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:52,787 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-26 19:39:52,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:39:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-26 19:39:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:39:52,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:52,789 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:52,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:39:52,789 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash 262866626, now seen corresponding path program 13 times [2020-10-26 19:39:52,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:52,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570029539] [2020-10-26 19:39:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:57,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:39:57,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:58,568 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-26 19:39:58,827 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-26 19:39:59,061 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-26 19:39:59,245 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-26 19:39:59,662 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-26 19:40:00,138 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-26 19:40:00,378 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-26 19:40:01,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:01,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:01,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:01,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:02,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570029539] [2020-10-26 19:40:02,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:02,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:40:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039343200] [2020-10-26 19:40:02,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:40:02,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:40:02,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:40:02,018 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 39 states. [2020-10-26 19:40:02,728 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 19:40:03,719 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-26 19:40:03,979 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-26 19:40:04,262 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-26 19:40:04,551 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-26 19:40:04,790 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2020-10-26 19:40:05,058 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2020-10-26 19:40:05,316 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2020-10-26 19:40:05,614 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-10-26 19:40:05,912 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-26 19:40:06,234 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-10-26 19:40:06,533 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-26 19:40:06,876 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-26 19:40:07,132 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-26 19:40:07,500 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2020-10-26 19:40:07,751 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-26 19:40:08,010 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-26 19:40:08,285 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-26 19:40:08,557 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-10-26 19:40:08,785 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-26 19:40:09,138 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-26 19:40:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:09,391 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-26 19:40:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:40:09,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2020-10-26 19:40:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:09,393 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:40:09,393 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:40:09,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=628, Invalid=3662, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:40:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:40:09,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:40:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:40:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:40:09,404 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 62 [2020-10-26 19:40:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:09,405 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:40:09,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:40:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:40:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:40:09,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:09,407 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:09,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:40:09,408 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1859839083, now seen corresponding path program 14 times [2020-10-26 19:40:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:09,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527552953] [2020-10-26 19:40:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:40:14,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:15,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:15,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:15,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:15,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:15,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:15,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:15,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:15,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:15,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:15,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:15,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 38 proven. 141 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:15,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527552953] [2020-10-26 19:40:15,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:15,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:40:15,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736908952] [2020-10-26 19:40:15,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:40:15,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:15,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:40:15,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:40:15,417 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 31 states. [2020-10-26 19:40:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:17,694 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2020-10-26 19:40:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:40:17,694 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-10-26 19:40:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:17,696 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:40:17,696 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:40:17,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2020-10-26 19:40:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:40:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-26 19:40:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:40:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-26 19:40:17,707 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2020-10-26 19:40:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:17,707 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-26 19:40:17,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:40:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-26 19:40:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:40:17,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:17,708 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:17,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:40:17,709 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2042889289, now seen corresponding path program 15 times [2020-10-26 19:40:17,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:17,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056877333] [2020-10-26 19:40:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:40:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:23,650 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-26 19:40:23,827 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-26 19:40:24,043 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-26 19:40:24,295 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-26 19:40:24,545 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-26 19:40:24,736 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-26 19:40:24,960 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-26 19:40:25,267 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 51 [2020-10-26 19:40:25,511 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2020-10-26 19:40:25,772 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2020-10-26 19:40:25,966 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2020-10-26 19:40:26,197 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-26 19:40:26,640 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-26 19:40:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:28,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:28,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:28,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:28,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:28,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:28,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 3 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:28,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056877333] [2020-10-26 19:40:28,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:28,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:40:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643309702] [2020-10-26 19:40:28,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:40:28,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:40:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:40:28,409 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 43 states. [2020-10-26 19:40:28,815 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:40:29,065 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-26 19:40:29,323 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-26 19:40:29,579 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-26 19:40:29,842 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-26 19:40:30,105 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-26 19:40:30,380 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:40:30,662 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-26 19:40:31,064 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-26 19:40:31,279 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-10-26 19:40:31,540 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-26 19:40:31,817 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2020-10-26 19:40:32,170 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 58 [2020-10-26 19:40:32,536 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-10-26 19:40:32,921 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-26 19:40:33,288 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-26 19:40:33,665 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-26 19:40:34,019 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-26 19:40:34,304 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 61 [2020-10-26 19:40:34,767 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-26 19:40:35,168 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-26 19:40:35,540 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-26 19:40:35,842 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-26 19:40:36,185 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-26 19:40:36,457 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-26 19:40:36,792 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:40:37,116 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-26 19:40:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:37,717 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-26 19:40:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:40:37,718 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 67 [2020-10-26 19:40:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:37,719 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:40:37,720 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:40:37,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=727, Invalid=4529, Unknown=0, NotChecked=0, Total=5256 [2020-10-26 19:40:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:40:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:40:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:40:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-26 19:40:37,729 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 67 [2020-10-26 19:40:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:37,730 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-26 19:40:37,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:40:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-26 19:40:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:40:37,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:37,731 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:37,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:40:37,731 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1072629376, now seen corresponding path program 16 times [2020-10-26 19:40:37,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:37,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253191346] [2020-10-26 19:40:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:37,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:42,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:40:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:44,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:44,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:44,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:44,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:44,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 33 proven. 191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:44,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253191346] [2020-10-26 19:40:44,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:44,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:40:44,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090838836] [2020-10-26 19:40:44,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:40:44,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:40:44,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:40:44,047 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 34 states. [2020-10-26 19:40:44,736 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2020-10-26 19:40:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:47,155 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-26 19:40:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:40:47,156 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2020-10-26 19:40:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:47,158 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:40:47,158 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:40:47,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1042, Invalid=4360, Unknown=0, NotChecked=0, Total=5402 [2020-10-26 19:40:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:40:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-26 19:40:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:40:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-26 19:40:47,169 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 70 [2020-10-26 19:40:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:47,169 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-26 19:40:47,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:40:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-26 19:40:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:40:47,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:47,170 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:47,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:40:47,170 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2144801890, now seen corresponding path program 17 times [2020-10-26 19:40:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:47,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615687980] [2020-10-26 19:40:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:49,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:52,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:52,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:40:52,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:40:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:40:52,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:40:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:40:52,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:53,834 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-26 19:40:54,302 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-26 19:40:54,573 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-26 19:40:54,861 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-26 19:40:55,055 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-26 19:40:55,303 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-26 19:40:55,594 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2020-10-26 19:40:55,924 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-26 19:40:56,180 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-26 19:40:56,390 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 19:40:56,597 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-26 19:40:56,807 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-26 19:40:57,055 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-26 19:40:57,473 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-26 19:40:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:59,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:59,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:59,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:59,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:59,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:59,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:59,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:59,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:59,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 49 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:59,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615687980] [2020-10-26 19:40:59,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:59,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:40:59,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447797739] [2020-10-26 19:40:59,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:40:59,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:40:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:40:59,488 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 47 states. [2020-10-26 19:41:00,327 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-26 19:41:00,714 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-26 19:41:01,117 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-26 19:41:01,556 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-26 19:41:02,016 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-26 19:41:02,515 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-26 19:41:03,073 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-26 19:41:03,601 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-26 19:41:03,909 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-26 19:41:05,041 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 134 [2020-10-26 19:41:05,288 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-26 19:41:05,573 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 53 [2020-10-26 19:41:06,095 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 66 [2020-10-26 19:41:06,557 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 63 [2020-10-26 19:41:06,998 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 64 [2020-10-26 19:41:07,526 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 64 [2020-10-26 19:41:07,985 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 66 [2020-10-26 19:41:08,797 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 81 [2020-10-26 19:41:09,481 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 67 [2020-10-26 19:41:10,121 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 69 [2020-10-26 19:41:10,827 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 70 [2020-10-26 19:41:11,609 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 67 [2020-10-26 19:41:12,332 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 69 [2020-10-26 19:41:12,991 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 70 [2020-10-26 19:41:13,652 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 76 [2020-10-26 19:41:14,295 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 78 [2020-10-26 19:41:14,861 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 61 [2020-10-26 19:41:15,373 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2020-10-26 19:41:15,846 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2020-10-26 19:41:16,348 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 56 [2020-10-26 19:41:16,787 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-26 19:41:17,246 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 57 [2020-10-26 19:41:17,584 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-26 19:41:17,923 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-26 19:41:18,234 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-26 19:41:18,557 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-26 19:41:19,206 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 82 [2020-10-26 19:41:19,451 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-26 19:41:20,083 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 84 [2020-10-26 19:41:20,517 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-26 19:41:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:20,858 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-26 19:41:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:41:20,859 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2020-10-26 19:41:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:20,861 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:41:20,861 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:41:20,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1312, Invalid=8000, Unknown=0, NotChecked=0, Total=9312 [2020-10-26 19:41:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:41:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-26 19:41:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:41:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-26 19:41:20,873 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 72 [2020-10-26 19:41:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:20,873 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-26 19:41:20,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:41:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-26 19:41:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:41:20,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:20,874 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:20,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:41:20,874 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:20,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1536211257, now seen corresponding path program 18 times [2020-10-26 19:41:20,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:20,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224571118] [2020-10-26 19:41:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:21,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:23,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:24,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:25,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:25,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:41:25,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:41:25,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:41:25,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:25,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:41:25,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:25,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:41:25,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:26,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:26,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:26,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:26,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:26,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:26,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:26,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:26,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 157 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:26,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224571118] [2020-10-26 19:41:26,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:26,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:41:26,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765876868] [2020-10-26 19:41:26,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:41:26,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:26,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:41:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:41:26,508 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 26 states. [2020-10-26 19:41:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:28,207 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2020-10-26 19:41:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:41:28,208 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-26 19:41:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:28,210 INFO L225 Difference]: With dead ends: 178 [2020-10-26 19:41:28,210 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:41:28,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=793, Invalid=1859, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:41:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:41:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-26 19:41:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:41:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-26 19:41:28,223 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 75 [2020-10-26 19:41:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:28,223 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-26 19:41:28,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:41:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-26 19:41:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:41:28,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:28,224 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:28,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:41:28,224 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1341085403, now seen corresponding path program 19 times [2020-10-26 19:41:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:28,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839647366] [2020-10-26 19:41:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:31,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:33,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:33,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:41:33,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:41:33,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:41:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:41:33,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:34,525 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-26 19:41:34,829 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-26 19:41:35,148 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-26 19:41:35,636 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-26 19:41:36,074 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-26 19:41:36,502 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-26 19:41:36,992 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 59 [2020-10-26 19:41:37,403 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-10-26 19:41:37,685 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2020-10-26 19:41:38,004 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-10-26 19:41:38,424 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-10-26 19:41:38,803 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2020-10-26 19:41:39,162 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-26 19:41:39,508 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-26 19:41:39,914 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2020-10-26 19:41:40,240 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-10-26 19:41:40,668 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2020-10-26 19:41:40,987 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2020-10-26 19:41:41,320 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2020-10-26 19:41:41,795 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-26 19:41:44,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:44,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:44,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:44,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:44,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:44,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 1 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:44,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839647366] [2020-10-26 19:41:44,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:44,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:41:44,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522589555] [2020-10-26 19:41:44,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:41:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:44,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:41:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:41:44,331 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 51 states. [2020-10-26 19:41:45,498 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-26 19:41:45,885 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-26 19:41:46,276 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-26 19:41:46,676 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-26 19:41:47,283 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-10-26 19:41:47,896 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 73 [2020-10-26 19:41:48,441 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-26 19:41:49,360 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 86 [2020-10-26 19:41:49,806 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-10-26 19:41:50,249 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 61 [2020-10-26 19:41:50,705 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 66 [2020-10-26 19:41:51,196 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 62 [2020-10-26 19:41:51,744 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 63 [2020-10-26 19:41:52,306 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2020-10-26 19:41:52,922 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 64 [2020-10-26 19:41:53,611 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-26 19:41:54,479 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 59 [2020-10-26 19:41:54,850 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2020-10-26 19:41:55,479 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 65 [2020-10-26 19:41:56,387 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-10-26 19:41:56,995 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2020-10-26 19:41:57,932 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 63 [2020-10-26 19:41:58,428 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-26 19:41:59,349 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 63 [2020-10-26 19:41:59,866 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-26 19:42:00,733 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 63 [2020-10-26 19:42:01,234 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-26 19:42:01,868 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-10-26 19:42:02,790 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2020-10-26 19:42:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:03,189 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2020-10-26 19:42:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:42:03,195 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 77 [2020-10-26 19:42:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:03,196 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:42:03,196 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:42:03,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1025, Invalid=5781, Unknown=0, NotChecked=0, Total=6806 [2020-10-26 19:42:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:42:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-26 19:42:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:42:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-26 19:42:03,208 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 77 [2020-10-26 19:42:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:03,209 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-26 19:42:03,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:42:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-26 19:42:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:42:03,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:03,209 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:03,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:42:03,210 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1590307036, now seen corresponding path program 20 times [2020-10-26 19:42:03,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:03,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919900140] [2020-10-26 19:42:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:03,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:03,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:03,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:03,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:04,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:05,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:05,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking...