/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=DEEPEST --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-examples/standard_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:26:25,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:26:25,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:26:25,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:26:25,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:26:25,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:26:25,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:26:25,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:26:25,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:26:25,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:26:25,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:26:25,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:26:25,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:26:25,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:26:25,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:26:25,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:26:25,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:26:25,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:26:25,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:26:25,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:26:25,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:26:25,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:26:25,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:26:25,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:26:25,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:26:25,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:26:25,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:26:25,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:26:25,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:26:25,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:26:25,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:26:25,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:26:25,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:26:25,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:26:25,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:26:25,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:26:25,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:26:25,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:26:25,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:26:25,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:26:25,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:26:25,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:26:25,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:26:25,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:26:25,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:26:25,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:26:25,613 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:26:25,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:26:25,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:26:25,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:26:25,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:26:25,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:26:25,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:26:25,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:26:25,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:26:25,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:26:25,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:26:25,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:26:25,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:26:25,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:26:25,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:26:25,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:26:25,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:26:25,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:25,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:26:25,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:26:25,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:26:25,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:26:25,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:26:25,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:26:25,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:26:25,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:26:25,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:26:26,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:26:26,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:26:26,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:26:26,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:26:26,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-27 14:26:26,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3723726ce/178faf069a184b98b0609da59da0fb49/FLAG4976644d1 [2020-10-27 14:26:26,643 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:26:26,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-27 14:26:26,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3723726ce/178faf069a184b98b0609da59da0fb49/FLAG4976644d1 [2020-10-27 14:26:27,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3723726ce/178faf069a184b98b0609da59da0fb49 [2020-10-27 14:26:27,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:26:27,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:26:27,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:27,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:26:27,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:26:27,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2b249a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27, skipping insertion in model container [2020-10-27 14:26:27,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:26:27,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:26:27,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:27,313 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:26:27,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:27,354 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:26:27,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27 WrapperNode [2020-10-27 14:26:27,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:27,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:26:27,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:26:27,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:26:27,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... [2020-10-27 14:26:27,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:26:27,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:26:27,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:26:27,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:26:27,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:27,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:26:27,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:26:27,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:26:27,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:26:27,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:26:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:26:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:26:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:26:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:26:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:26:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:26:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:26:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:26:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:26:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:26:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:26:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:26:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:26:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:26:27,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:26:27,746 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 14:26:27,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:27 BoogieIcfgContainer [2020-10-27 14:26:27,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:26:27,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:26:27,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:26:27,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:26:27,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:26:27" (1/3) ... [2020-10-27 14:26:27,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586c4c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:27, skipping insertion in model container [2020-10-27 14:26:27,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:27" (2/3) ... [2020-10-27 14:26:27,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586c4c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:27, skipping insertion in model container [2020-10-27 14:26:27,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:27" (3/3) ... [2020-10-27 14:26:27,757 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2020-10-27 14:26:27,770 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:26:27,775 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:26:27,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:26:27,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:26:27,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:26:27,818 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:26:27,818 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:26:27,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:26:27,819 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:26:27,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:26:27,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:26:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 14:26:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:26:27,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:27,845 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] [2020-10-27 14:26:27,845 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash -573516862, now seen corresponding path program 1 times [2020-10-27 14:26:27,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901839856] [2020-10-27 14:26:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:28,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:28,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:28,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:28,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:29,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:26:29,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:26:29,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-27 14:26:29,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:26:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:26:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:26:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:26:29,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:29,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:29,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:29,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:26:29,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:29,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901839856] [2020-10-27 14:26:29,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:29,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:26:29,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90097578] [2020-10-27 14:26:29,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:26:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:26:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:29,337 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-27 14:26:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:29,485 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2020-10-27 14:26:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:26:29,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 14:26:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:29,495 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:26:29,496 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 14:26:29,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 14:26:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 14:26:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:26:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-27 14:26:29,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-27 14:26:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:29,546 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-27 14:26:29,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:26:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-27 14:26:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:26:29,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:29,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:29,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:26:29,548 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1849424926, now seen corresponding path program 1 times [2020-10-27 14:26:29,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:29,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744124427] [2020-10-27 14:26:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:29,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:34,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:26:34,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:34,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:26:34,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:26:34,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:26:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:26:34,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:26:34,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:34,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:34,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:34,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:34,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:34,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:34,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:26:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:26:34,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744124427] [2020-10-27 14:26:34,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:34,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:26:34,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791423825] [2020-10-27 14:26:34,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:26:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:34,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:26:34,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:34,676 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-10-27 14:26:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:34,813 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-10-27 14:26:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:26:34,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-27 14:26:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:34,815 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:26:34,815 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:26:34,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:26:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 14:26:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:26:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 14:26:34,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2020-10-27 14:26:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:34,827 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 14:26:34,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:26:34,828 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 14:26:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:26:34,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:34,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:34,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:26:34,830 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -965935426, now seen corresponding path program 2 times [2020-10-27 14:26:34,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:34,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397379399] [2020-10-27 14:26:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:38,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:39,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:26:39,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:39,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:26:39,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:26:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:26:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:26:39,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:39,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:39,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:39,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:39,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:26:39,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:39,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:26:39,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397379399] [2020-10-27 14:26:39,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:39,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:26:39,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328007233] [2020-10-27 14:26:39,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:26:39,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:26:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:39,939 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-27 14:26:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:40,075 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-27 14:26:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:26:40,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 14:26:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:40,077 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:26:40,077 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:26:40,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:26:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 14:26:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:26:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-27 14:26:40,087 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 33 [2020-10-27 14:26:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:40,087 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-27 14:26:40,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:26:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-27 14:26:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:26:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:40,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:26:40,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:26:40,090 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash -646170978, now seen corresponding path program 3 times [2020-10-27 14:26:40,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:40,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236291126] [2020-10-27 14:26:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:45,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:26:45,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:26:45,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:26:45,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:45,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:26:45,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:26:45,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:26:45,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:26:45,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:45,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:45,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:45,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:26:45,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:45,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:45,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:45,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:45,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:26:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:26:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236291126] [2020-10-27 14:26:45,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:45,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:26:45,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398391644] [2020-10-27 14:26:45,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:26:45,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:45,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:26:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:45,214 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 7 states. [2020-10-27 14:26:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:45,422 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-27 14:26:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:26:45,423 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 14:26:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:45,425 INFO L225 Difference]: With dead ends: 81 [2020-10-27 14:26:45,425 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:26:45,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:26:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 14:26:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:26:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-27 14:26:45,445 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2020-10-27 14:26:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:45,446 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-27 14:26:45,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:26:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-27 14:26:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:26:45,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:45,451 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 14:26:45,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:26:45,451 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2024852802, now seen corresponding path program 4 times [2020-10-27 14:26:45,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:45,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777319628] [2020-10-27 14:26:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:45,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:46,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:50,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:26:50,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:26:50,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:26:50,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:50,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:26:50,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:26:50,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:26:50,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:50,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:50,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:50,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:50,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:26:50,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 14:26:50,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777319628] [2020-10-27 14:26:50,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:50,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:26:50,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121471089] [2020-10-27 14:26:50,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:26:50,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:26:50,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:26:50,617 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-10-27 14:26:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:50,770 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-27 14:26:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:26:50,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-27 14:26:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:50,772 INFO L225 Difference]: With dead ends: 90 [2020-10-27 14:26:50,772 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:26:50,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:26:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:26:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 14:26:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:26:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-27 14:26:50,781 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2020-10-27 14:26:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:50,782 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-27 14:26:50,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:26:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-27 14:26:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:26:50,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:50,783 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-27 14:26:50,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:26:50,784 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -724348642, now seen corresponding path program 5 times [2020-10-27 14:26:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813124746] [2020-10-27 14:26:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:26:55,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:26:55,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:26:55,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:26:55,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:26:55,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:26:55,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:55,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:55,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:55,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:55,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:55,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:55,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 14:26:55,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813124746] [2020-10-27 14:26:55,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:55,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:26:55,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222114172] [2020-10-27 14:26:55,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:26:55,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:26:55,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:26:55,914 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 9 states. [2020-10-27 14:26:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:56,059 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-27 14:26:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:26:56,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-27 14:26:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:56,061 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:26:56,061 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:26:56,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:26:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:26:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:26:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:26:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-27 14:26:56,070 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 48 [2020-10-27 14:26:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:56,071 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-27 14:26:56,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:26:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-27 14:26:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:26:56,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:56,072 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-27 14:26:56,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:26:56,073 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1812609346, now seen corresponding path program 6 times [2020-10-27 14:26:56,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:56,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399877670] [2020-10-27 14:26:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:27:01,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:01,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:01,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:27:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:27:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:27:01,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:01,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:01,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:01,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:01,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 14:27:01,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399877670] [2020-10-27 14:27:01,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:01,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:27:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822913188] [2020-10-27 14:27:01,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:27:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:27:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:01,230 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 10 states. [2020-10-27 14:27:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:01,379 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-27 14:27:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:27:01,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 14:27:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:01,381 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:27:01,381 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:27:01,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:27:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 14:27:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:27:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-27 14:27:01,397 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 53 [2020-10-27 14:27:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:01,397 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-27 14:27:01,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:27:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-27 14:27:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:27:01,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:01,399 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-27 14:27:01,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:27:01,399 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1607119970, now seen corresponding path program 7 times [2020-10-27 14:27:01,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:01,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771342677] [2020-10-27 14:27:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:02,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:06,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:27:06,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:27:06,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:27:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:27:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:27:06,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:06,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:06,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:06,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:06,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:06,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:06,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-27 14:27:06,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771342677] [2020-10-27 14:27:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:27:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319797397] [2020-10-27 14:27:06,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:27:06,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:06,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:27:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:06,581 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 11 states. [2020-10-27 14:27:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:06,773 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-27 14:27:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:27:06,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-27 14:27:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:06,774 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:27:06,774 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 14:27:06,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 14:27:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 14:27:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:27:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-27 14:27:06,783 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 58 [2020-10-27 14:27:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:06,783 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-27 14:27:06,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:27:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-27 14:27:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:27:06,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:06,785 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-10-27 14:27:06,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:27:06,785 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2001517246, now seen corresponding path program 8 times [2020-10-27 14:27:06,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:06,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505758849] [2020-10-27 14:27:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:11,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:11,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:11,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:11,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:11,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:11,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:27:11,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505758849] [2020-10-27 14:27:11,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:11,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607934075] [2020-10-27 14:27:11,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:11,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:11,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:11,969 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 12 states. [2020-10-27 14:27:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:12,154 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-10-27 14:27:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:27:12,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-27 14:27:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:12,156 INFO L225 Difference]: With dead ends: 126 [2020-10-27 14:27:12,156 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:27:12,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:27:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 14:27:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:27:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-27 14:27:12,167 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 63 [2020-10-27 14:27:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:12,168 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-27 14:27:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-27 14:27:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:27:12,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:12,169 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-10-27 14:27:12,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:27:12,169 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2073437726, now seen corresponding path program 9 times [2020-10-27 14:27:12,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:12,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807525670] [2020-10-27 14:27:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:17,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:27:17,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:17,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:17,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:17,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:27:17,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:17,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:17,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:17,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:17,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:17,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:17,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:17,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:27:17,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807525670] [2020-10-27 14:27:17,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:17,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:17,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058743679] [2020-10-27 14:27:17,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:17,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:17,352 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 13 states. [2020-10-27 14:27:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:17,541 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2020-10-27 14:27:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:17,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-27 14:27:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:17,542 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:27:17,542 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:27:17,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:27:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-27 14:27:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:27:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-27 14:27:17,562 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 68 [2020-10-27 14:27:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:17,563 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-27 14:27:17,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-27 14:27:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:27:17,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:17,566 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 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] [2020-10-27 14:27:17,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:17,569 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash 742395582, now seen corresponding path program 10 times [2020-10-27 14:27:17,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:17,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644318283] [2020-10-27 14:27:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:27:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:27:22,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:22,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:22,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:22,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:22,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:22,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-27 14:27:22,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644318283] [2020-10-27 14:27:22,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:22,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:27:22,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775390183] [2020-10-27 14:27:22,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:27:22,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:27:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:22,775 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 14 states. [2020-10-27 14:27:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:23,070 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-10-27 14:27:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:23,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-27 14:27:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:23,071 INFO L225 Difference]: With dead ends: 144 [2020-10-27 14:27:23,071 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:27:23,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:27:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 14:27:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:27:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-27 14:27:23,090 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 73 [2020-10-27 14:27:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:23,090 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-27 14:27:23,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:27:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-27 14:27:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:27:23,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:23,096 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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] [2020-10-27 14:27:23,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:27:23,096 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash -420880226, now seen corresponding path program 11 times [2020-10-27 14:27:23,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:23,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415948331] [2020-10-27 14:27:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:23,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:28,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:27:28,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:28,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:28,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:28,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:28,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:28,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:28,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:28,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:28,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-27 14:27:28,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415948331] [2020-10-27 14:27:28,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:28,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:28,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159624155] [2020-10-27 14:27:28,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:28,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:28,335 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 15 states. [2020-10-27 14:27:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:28,572 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2020-10-27 14:27:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:28,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-27 14:27:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:28,573 INFO L225 Difference]: With dead ends: 153 [2020-10-27 14:27:28,574 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:27:28,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:27:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 14:27:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:27:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-27 14:27:28,591 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 78 [2020-10-27 14:27:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:28,607 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-27 14:27:28,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-27 14:27:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:27:28,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:28,609 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:28,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:27:28,609 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:28,610 INFO L82 PathProgramCache]: Analyzing trace with hash -574897474, now seen corresponding path program 12 times [2020-10-27 14:27:28,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:28,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066644068] [2020-10-27 14:27:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:28,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:33,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:33,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:33,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:33,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:33,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:33,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:33,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:33,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-27 14:27:33,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066644068] [2020-10-27 14:27:33,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:33,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:27:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788308933] [2020-10-27 14:27:33,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:27:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:33,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:27:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:33,833 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 16 states. [2020-10-27 14:27:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:34,160 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2020-10-27 14:27:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:27:34,161 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2020-10-27 14:27:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:34,161 INFO L225 Difference]: With dead ends: 162 [2020-10-27 14:27:34,162 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:27:34,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:27:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-27 14:27:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:27:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-27 14:27:34,175 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 83 [2020-10-27 14:27:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:34,175 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-27 14:27:34,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:27:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-27 14:27:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 14:27:34,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:34,176 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:34,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:27:34,177 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -500925666, now seen corresponding path program 13 times [2020-10-27 14:27:34,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:34,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29647067] [2020-10-27 14:27:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:34,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:27:39,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:39,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-27 14:27:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29647067] [2020-10-27 14:27:39,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:39,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:27:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329545490] [2020-10-27 14:27:39,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:27:39,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:39,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:27:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:39,432 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 17 states. [2020-10-27 14:27:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:39,653 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2020-10-27 14:27:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:27:39,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-27 14:27:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:39,654 INFO L225 Difference]: With dead ends: 171 [2020-10-27 14:27:39,654 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:27:39,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:27:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-27 14:27:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 14:27:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2020-10-27 14:27:39,668 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 88 [2020-10-27 14:27:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:39,668 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2020-10-27 14:27:39,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:27:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2020-10-27 14:27:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:27:39,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:39,669 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:39,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:27:39,670 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1498687810, now seen corresponding path program 14 times [2020-10-27 14:27:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68268333] [2020-10-27 14:27:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:27:44,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:44,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:27:44,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:27:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:27:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:27:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:44,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:44,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:44,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:44,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:44,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-27 14:27:44,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68268333] [2020-10-27 14:27:44,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:44,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:27:44,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809245844] [2020-10-27 14:27:44,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:27:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:27:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:44,947 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 18 states. [2020-10-27 14:27:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:45,231 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2020-10-27 14:27:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:27:45,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-10-27 14:27:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:45,232 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:27:45,232 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:27:45,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:27:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 14:27:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:27:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-27 14:27:45,243 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 93 [2020-10-27 14:27:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:45,243 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-27 14:27:45,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:27:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-27 14:27:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 14:27:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:45,244 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:45,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:27:45,245 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 758773150, now seen corresponding path program 15 times [2020-10-27 14:27:45,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:45,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227455478] [2020-10-27 14:27:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 14:27:50,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:50,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:50,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:27:50,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 14:27:50,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:27:50,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:50,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:50,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:50,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:50,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-27 14:27:50,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227455478] [2020-10-27 14:27:50,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:50,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:27:50,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190335024] [2020-10-27 14:27:50,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:27:50,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:27:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:50,551 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 19 states. [2020-10-27 14:27:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:50,878 INFO L93 Difference]: Finished difference Result 189 states and 203 transitions. [2020-10-27 14:27:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:27:50,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-10-27 14:27:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:50,880 INFO L225 Difference]: With dead ends: 189 [2020-10-27 14:27:50,880 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:27:50,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:27:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-27 14:27:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:27:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-27 14:27:50,888 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 98 [2020-10-27 14:27:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:50,888 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-27 14:27:50,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:27:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-27 14:27:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:27:50,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:50,890 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:50,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:27:50,890 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1375488702, now seen corresponding path program 16 times [2020-10-27 14:27:50,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:50,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982932192] [2020-10-27 14:27:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:55,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:27:55,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:27:55,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:27:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:27:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:27:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:56,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:56,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:56,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:56,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-10-27 14:27:56,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982932192] [2020-10-27 14:27:56,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:56,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:27:56,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774437339] [2020-10-27 14:27:56,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:27:56,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:27:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:56,190 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 20 states. [2020-10-27 14:27:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:56,504 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2020-10-27 14:27:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:27:56,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-27 14:27:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:56,506 INFO L225 Difference]: With dead ends: 198 [2020-10-27 14:27:56,506 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 14:27:56,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 14:27:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-27 14:27:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 14:27:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-27 14:27:56,514 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 103 [2020-10-27 14:27:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:56,515 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-27 14:27:56,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:27:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-27 14:27:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 14:27:56,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:56,516 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:56,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:27:56,517 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:56,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2011279330, now seen corresponding path program 17 times [2020-10-27 14:27:56,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:56,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758098989] [2020-10-27 14:27:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 14:28:01,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:28:01,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:28:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:28:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:28:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:01,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:01,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:01,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:01,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:01,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:01,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-27 14:28:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758098989] [2020-10-27 14:28:01,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:01,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:28:01,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443330727] [2020-10-27 14:28:01,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:28:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:28:01,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:01,839 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 21 states. [2020-10-27 14:28:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:02,182 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2020-10-27 14:28:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:28:02,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-10-27 14:28:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:02,184 INFO L225 Difference]: With dead ends: 207 [2020-10-27 14:28:02,184 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 14:28:02,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 14:28:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-27 14:28:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:28:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2020-10-27 14:28:02,193 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 108 [2020-10-27 14:28:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:02,193 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2020-10-27 14:28:02,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:28:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2020-10-27 14:28:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:28:02,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:02,195 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:28:02,195 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash 446242494, now seen corresponding path program 18 times [2020-10-27 14:28:02,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:02,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914744141] [2020-10-27 14:28:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:02,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:28:07,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:28:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:28:07,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:07,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-27 14:28:07,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914744141] [2020-10-27 14:28:07,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:07,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:28:07,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543249750] [2020-10-27 14:28:07,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:28:07,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:28:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:07,558 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand 22 states. [2020-10-27 14:28:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:07,889 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2020-10-27 14:28:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:28:07,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-10-27 14:28:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:07,891 INFO L225 Difference]: With dead ends: 216 [2020-10-27 14:28:07,891 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 14:28:07,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 14:28:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-27 14:28:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 14:28:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2020-10-27 14:28:07,900 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 113 [2020-10-27 14:28:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:07,900 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2020-10-27 14:28:07,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:28:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2020-10-27 14:28:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 14:28:07,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:07,902 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:07,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:28:07,902 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash -221934946, now seen corresponding path program 19 times [2020-10-27 14:28:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:07,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200241784] [2020-10-27 14:28:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:07,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:12,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:12,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:28:12,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:13,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:13,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:13,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-10-27 14:28:13,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200241784] [2020-10-27 14:28:13,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:13,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:28:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330842458] [2020-10-27 14:28:13,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:28:13,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:28:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:13,282 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 23 states. [2020-10-27 14:28:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:13,570 INFO L93 Difference]: Finished difference Result 225 states and 239 transitions. [2020-10-27 14:28:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:28:13,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-10-27 14:28:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:13,571 INFO L225 Difference]: With dead ends: 225 [2020-10-27 14:28:13,571 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:28:13,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:28:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-27 14:28:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:28:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-10-27 14:28:13,580 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 118 [2020-10-27 14:28:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:13,582 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-10-27 14:28:13,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:28:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-10-27 14:28:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:28:13,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:13,583 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:13,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:28:13,584 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:13,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1802392254, now seen corresponding path program 20 times [2020-10-27 14:28:13,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:13,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625859738] [2020-10-27 14:28:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:18,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:28:18,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:28:18,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:28:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:28:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:28:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:18,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:18,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:18,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:18,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:18,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-27 14:28:18,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625859738] [2020-10-27 14:28:18,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:18,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:28:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667569478] [2020-10-27 14:28:18,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:28:18,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:18,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:28:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:18,990 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 24 states. [2020-10-27 14:28:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:19,379 INFO L93 Difference]: Finished difference Result 234 states and 248 transitions. [2020-10-27 14:28:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:28:19,380 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2020-10-27 14:28:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:19,381 INFO L225 Difference]: With dead ends: 234 [2020-10-27 14:28:19,382 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 14:28:19,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 14:28:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-27 14:28:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:28:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-27 14:28:19,390 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 123 [2020-10-27 14:28:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:19,391 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-27 14:28:19,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:28:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-27 14:28:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 14:28:19,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:19,392 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:19,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:28:19,393 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash -316431074, now seen corresponding path program 21 times [2020-10-27 14:28:19,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:19,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371104230] [2020-10-27 14:28:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:19,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:24,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:28:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:24,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:24,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:24,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-10-27 14:28:24,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371104230] [2020-10-27 14:28:24,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:24,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:28:24,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385618045] [2020-10-27 14:28:24,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:28:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:28:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:24,829 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 25 states. [2020-10-27 14:28:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:25,177 INFO L93 Difference]: Finished difference Result 243 states and 257 transitions. [2020-10-27 14:28:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:28:25,181 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 128 [2020-10-27 14:28:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:25,182 INFO L225 Difference]: With dead ends: 243 [2020-10-27 14:28:25,182 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:28:25,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:28:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-27 14:28:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:28:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-27 14:28:25,191 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 128 [2020-10-27 14:28:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:25,192 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-27 14:28:25,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:28:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-27 14:28:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 14:28:25,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:25,193 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:25,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:28:25,194 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:25,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1620580674, now seen corresponding path program 22 times [2020-10-27 14:28:25,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:25,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429664909] [2020-10-27 14:28:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:30,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:30,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:28:30,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:30,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:30,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:30,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:30,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:30,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:30,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:30,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-10-27 14:28:30,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429664909] [2020-10-27 14:28:30,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:30,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:28:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895985338] [2020-10-27 14:28:30,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:28:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:28:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:30,670 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 26 states. [2020-10-27 14:28:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:31,108 INFO L93 Difference]: Finished difference Result 252 states and 266 transitions. [2020-10-27 14:28:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:28:31,108 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-10-27 14:28:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:31,109 INFO L225 Difference]: With dead ends: 252 [2020-10-27 14:28:31,109 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 14:28:31,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 14:28:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-27 14:28:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 14:28:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-10-27 14:28:31,118 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 133 [2020-10-27 14:28:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:31,118 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-10-27 14:28:31,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:28:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-10-27 14:28:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 14:28:31,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:31,120 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:31,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:28:31,121 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1221812322, now seen corresponding path program 23 times [2020-10-27 14:28:31,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:31,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619750926] [2020-10-27 14:28:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:31,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:36,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:36,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:28:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:36,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:36,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:36,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-10-27 14:28:36,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619750926] [2020-10-27 14:28:36,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:36,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:28:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519515215] [2020-10-27 14:28:36,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:28:36,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:28:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:28:36,611 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 27 states. [2020-10-27 14:28:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:37,026 INFO L93 Difference]: Finished difference Result 261 states and 275 transitions. [2020-10-27 14:28:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:28:37,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 138 [2020-10-27 14:28:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:37,028 INFO L225 Difference]: With dead ends: 261 [2020-10-27 14:28:37,028 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 14:28:37,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:28:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 14:28:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-27 14:28:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 14:28:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2020-10-27 14:28:37,044 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 138 [2020-10-27 14:28:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:37,044 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2020-10-27 14:28:37,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:28:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2020-10-27 14:28:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 14:28:37,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:37,046 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:37,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:28:37,048 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1049503042, now seen corresponding path program 24 times [2020-10-27 14:28:37,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:37,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749122600] [2020-10-27 14:28:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:37,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:42,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:42,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:28:42,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:28:42,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:28:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 14:28:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:28:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:42,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:42,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:42,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:42,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-27 14:28:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749122600] [2020-10-27 14:28:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:28:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392313184] [2020-10-27 14:28:42,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:28:42,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:28:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:28:42,579 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 28 states. [2020-10-27 14:28:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:42,908 INFO L93 Difference]: Finished difference Result 270 states and 284 transitions. [2020-10-27 14:28:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:28:42,908 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 143 [2020-10-27 14:28:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:42,910 INFO L225 Difference]: With dead ends: 270 [2020-10-27 14:28:42,910 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 14:28:42,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:28:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 14:28:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-27 14:28:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:28:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2020-10-27 14:28:42,925 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 143 [2020-10-27 14:28:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:42,925 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2020-10-27 14:28:42,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:28:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2020-10-27 14:28:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 14:28:42,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:42,928 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:42,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:28:42,928 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1865123298, now seen corresponding path program 25 times [2020-10-27 14:28:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:42,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959942661] [2020-10-27 14:28:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:28:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:48,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:48,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:48,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:48,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:48,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:48,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:28:48,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:48,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-10-27 14:28:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959942661] [2020-10-27 14:28:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:48,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:28:48,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003380978] [2020-10-27 14:28:48,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:28:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:28:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:28:48,498 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand 29 states. [2020-10-27 14:28:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:48,899 INFO L93 Difference]: Finished difference Result 279 states and 293 transitions. [2020-10-27 14:28:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:28:48,899 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 148 [2020-10-27 14:28:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:48,900 INFO L225 Difference]: With dead ends: 279 [2020-10-27 14:28:48,901 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 14:28:48,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:28:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 14:28:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-27 14:28:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:28:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 163 transitions. [2020-10-27 14:28:48,910 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 163 transitions. Word has length 148 [2020-10-27 14:28:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:48,910 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 163 transitions. [2020-10-27 14:28:48,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:28:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 163 transitions. [2020-10-27 14:28:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 14:28:48,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:48,912 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:48,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:28:48,912 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1282944702, now seen corresponding path program 26 times [2020-10-27 14:28:48,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:48,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851729535] [2020-10-27 14:28:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:53,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:53,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 14:28:53,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:53,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:28:53,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:28:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 14:28:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:28:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:54,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:54,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:54,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:54,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:54,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:54,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:28:54,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:54,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:54,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:54,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:54,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-27 14:28:54,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851729535] [2020-10-27 14:28:54,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:54,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:28:54,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889040214] [2020-10-27 14:28:54,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:28:54,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:28:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:28:54,564 INFO L87 Difference]: Start difference. First operand 158 states and 163 transitions. Second operand 30 states. [2020-10-27 14:28:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:55,053 INFO L93 Difference]: Finished difference Result 288 states and 302 transitions. [2020-10-27 14:28:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:28:55,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 153 [2020-10-27 14:28:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:55,055 INFO L225 Difference]: With dead ends: 288 [2020-10-27 14:28:55,055 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 14:28:55,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:28:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 14:28:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-27 14:28:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 14:28:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2020-10-27 14:28:55,070 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 153 [2020-10-27 14:28:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:55,071 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2020-10-27 14:28:55,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:28:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2020-10-27 14:28:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 14:28:55,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:55,072 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:55,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:28:55,073 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -99666786, now seen corresponding path program 27 times [2020-10-27 14:28:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:55,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939703692] [2020-10-27 14:28:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:55,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:55,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:55,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:56,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:00,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:00,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:29:00,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:00,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:00,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:00,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:00,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:00,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:00,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:00,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:00,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-10-27 14:29:00,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939703692] [2020-10-27 14:29:00,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:00,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:29:00,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422440303] [2020-10-27 14:29:00,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:29:00,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:29:00,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:00,687 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand 31 states. [2020-10-27 14:29:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:01,195 INFO L93 Difference]: Finished difference Result 297 states and 311 transitions. [2020-10-27 14:29:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:29:01,195 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 158 [2020-10-27 14:29:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:01,197 INFO L225 Difference]: With dead ends: 297 [2020-10-27 14:29:01,198 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:29:01,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:29:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-27 14:29:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:29:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-27 14:29:01,207 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 158 [2020-10-27 14:29:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:01,207 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-27 14:29:01,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:29:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-27 14:29:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 14:29:01,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:01,208 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:01,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:29:01,209 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash -345578818, now seen corresponding path program 28 times [2020-10-27 14:29:01,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:01,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52446041] [2020-10-27 14:29:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:06,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:29:06,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:29:06,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:29:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:29:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:29:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:06,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:06,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-10-27 14:29:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52446041] [2020-10-27 14:29:06,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:06,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:29:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599852807] [2020-10-27 14:29:06,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:29:06,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:06,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:29:06,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:06,895 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 32 states. [2020-10-27 14:29:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:07,309 INFO L93 Difference]: Finished difference Result 306 states and 320 transitions. [2020-10-27 14:29:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:29:07,310 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 163 [2020-10-27 14:29:07,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:07,312 INFO L225 Difference]: With dead ends: 306 [2020-10-27 14:29:07,312 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 14:29:07,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 14:29:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2020-10-27 14:29:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 14:29:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 178 transitions. [2020-10-27 14:29:07,322 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 178 transitions. Word has length 163 [2020-10-27 14:29:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:07,322 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 178 transitions. [2020-10-27 14:29:07,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:29:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 178 transitions. [2020-10-27 14:29:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 14:29:07,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:07,323 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:07,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:29:07,324 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash -221196514, now seen corresponding path program 29 times [2020-10-27 14:29:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:07,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875636443] [2020-10-27 14:29:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:07,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:09,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:29:12,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-27 14:29:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:29:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:13,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:13,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:13,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:13,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:13,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:29:13,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:13,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:13,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:13,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:13,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-10-27 14:29:13,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875636443] [2020-10-27 14:29:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:13,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:29:13,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251229603] [2020-10-27 14:29:13,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:29:13,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:29:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:13,034 INFO L87 Difference]: Start difference. First operand 173 states and 178 transitions. Second operand 33 states. [2020-10-27 14:29:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:13,489 INFO L93 Difference]: Finished difference Result 315 states and 329 transitions. [2020-10-27 14:29:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:29:13,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 168 [2020-10-27 14:29:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:13,491 INFO L225 Difference]: With dead ends: 315 [2020-10-27 14:29:13,491 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 14:29:13,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 14:29:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-27 14:29:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 14:29:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 183 transitions. [2020-10-27 14:29:13,513 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 183 transitions. Word has length 168 [2020-10-27 14:29:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:13,513 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 183 transitions. [2020-10-27 14:29:13,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:29:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 183 transitions. [2020-10-27 14:29:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:29:13,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:13,517 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:13,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:29:13,517 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 959051454, now seen corresponding path program 30 times [2020-10-27 14:29:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:13,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338416318] [2020-10-27 14:29:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:13,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:15,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:18,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:18,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:29:18,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:29:18,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:29:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 14:29:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:29:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:19,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:19,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:19,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:19,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-10-27 14:29:19,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338416318] [2020-10-27 14:29:19,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:19,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:29:19,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816626043] [2020-10-27 14:29:19,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:29:19,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:29:19,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:19,314 INFO L87 Difference]: Start difference. First operand 178 states and 183 transitions. Second operand 34 states. [2020-10-27 14:29:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:19,869 INFO L93 Difference]: Finished difference Result 324 states and 338 transitions. [2020-10-27 14:29:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:29:19,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2020-10-27 14:29:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:19,872 INFO L225 Difference]: With dead ends: 324 [2020-10-27 14:29:19,872 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 14:29:19,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 14:29:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-10-27 14:29:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 14:29:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 188 transitions. [2020-10-27 14:29:19,884 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 188 transitions. Word has length 173 [2020-10-27 14:29:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:19,885 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 188 transitions. [2020-10-27 14:29:19,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:29:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 188 transitions. [2020-10-27 14:29:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 14:29:19,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:19,886 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:29:19,888 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash 990726558, now seen corresponding path program 31 times [2020-10-27 14:29:19,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:19,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084344717] [2020-10-27 14:29:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:20,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:20,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:21,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:29:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-27 14:29:24,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:29:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:25,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:25,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:25,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:25,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:25,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:25,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:25,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:25,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-10-27 14:29:25,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084344717] [2020-10-27 14:29:25,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:25,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:29:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943943359] [2020-10-27 14:29:25,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:29:25,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:29:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:25,734 INFO L87 Difference]: Start difference. First operand 183 states and 188 transitions. Second operand 35 states. [2020-10-27 14:29:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:26,268 INFO L93 Difference]: Finished difference Result 333 states and 347 transitions. [2020-10-27 14:29:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:29:26,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 178 [2020-10-27 14:29:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:26,274 INFO L225 Difference]: With dead ends: 333 [2020-10-27 14:29:26,274 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 14:29:26,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 14:29:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-27 14:29:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 14:29:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 193 transitions. [2020-10-27 14:29:26,290 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 193 transitions. Word has length 178 [2020-10-27 14:29:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:26,295 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 193 transitions. [2020-10-27 14:29:26,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:29:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 193 transitions. [2020-10-27 14:29:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:29:26,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:26,298 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:26,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:29:26,298 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:26,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2136118594, now seen corresponding path program 32 times [2020-10-27 14:29:26,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:26,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516242032] [2020-10-27 14:29:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:26,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:29:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:32,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-10-27 14:29:32,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516242032] [2020-10-27 14:29:32,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:32,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:29:32,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833819109] [2020-10-27 14:29:32,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:29:32,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:32,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:29:32,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:29:32,168 INFO L87 Difference]: Start difference. First operand 188 states and 193 transitions. Second operand 36 states. [2020-10-27 14:29:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:32,759 INFO L93 Difference]: Finished difference Result 342 states and 356 transitions. [2020-10-27 14:29:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:29:32,759 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 183 [2020-10-27 14:29:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:32,761 INFO L225 Difference]: With dead ends: 342 [2020-10-27 14:29:32,761 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 14:29:32,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:29:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 14:29:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-27 14:29:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 14:29:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 198 transitions. [2020-10-27 14:29:32,776 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 198 transitions. Word has length 183 [2020-10-27 14:29:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:32,776 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 198 transitions. [2020-10-27 14:29:32,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:29:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 198 transitions. [2020-10-27 14:29:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-27 14:29:32,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:32,779 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:32,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:29:32,779 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1833393122, now seen corresponding path program 33 times [2020-10-27 14:29:32,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:32,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657738504] [2020-10-27 14:29:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:32,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:37,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:37,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 14:29:37,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:29:37,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:29:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-27 14:29:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:29:37,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:38,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:38,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:38,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:38,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:38,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:38,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:38,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:38,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-10-27 14:29:38,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657738504] [2020-10-27 14:29:38,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:38,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:29:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060697464] [2020-10-27 14:29:38,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:29:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:29:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:29:38,649 INFO L87 Difference]: Start difference. First operand 193 states and 198 transitions. Second operand 37 states. [2020-10-27 14:29:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:39,192 INFO L93 Difference]: Finished difference Result 351 states and 365 transitions. [2020-10-27 14:29:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:29:39,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 188 [2020-10-27 14:29:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:39,194 INFO L225 Difference]: With dead ends: 351 [2020-10-27 14:29:39,194 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 14:29:39,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:29:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 14:29:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-27 14:29:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:29:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-10-27 14:29:39,204 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 188 [2020-10-27 14:29:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:39,205 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-10-27 14:29:39,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:29:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-10-27 14:29:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 14:29:39,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:39,206 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:39,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:29:39,207 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2094874302, now seen corresponding path program 34 times [2020-10-27 14:29:39,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:39,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390437969] [2020-10-27 14:29:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:41,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:44,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:44,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 14:29:44,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:44,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:29:44,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:44,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:29:44,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 14:29:44,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:29:44,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:45,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:45,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-27 14:29:45,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390437969] [2020-10-27 14:29:45,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:45,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:29:45,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750172178] [2020-10-27 14:29:45,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:29:45,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:29:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:29:45,112 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 38 states. [2020-10-27 14:29:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:45,721 INFO L93 Difference]: Finished difference Result 360 states and 374 transitions. [2020-10-27 14:29:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:29:45,722 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 193 [2020-10-27 14:29:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:45,724 INFO L225 Difference]: With dead ends: 360 [2020-10-27 14:29:45,724 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 14:29:45,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:29:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 14:29:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-10-27 14:29:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 14:29:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 208 transitions. [2020-10-27 14:29:45,733 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 208 transitions. Word has length 193 [2020-10-27 14:29:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:45,733 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 208 transitions. [2020-10-27 14:29:45,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:29:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 208 transitions. [2020-10-27 14:29:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 14:29:45,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:45,735 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:45,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:29:45,735 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash -104407394, now seen corresponding path program 35 times [2020-10-27 14:29:45,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:45,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289009758] [2020-10-27 14:29:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:45,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:50,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:50,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:29:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:51,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:51,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:51,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:51,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-10-27 14:29:51,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289009758] [2020-10-27 14:29:51,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:51,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:29:51,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400110019] [2020-10-27 14:29:51,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:29:51,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:51,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:29:51,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:29:51,679 INFO L87 Difference]: Start difference. First operand 203 states and 208 transitions. Second operand 39 states. [2020-10-27 14:29:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:52,196 INFO L93 Difference]: Finished difference Result 369 states and 383 transitions. [2020-10-27 14:29:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:29:52,196 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 198 [2020-10-27 14:29:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:52,198 INFO L225 Difference]: With dead ends: 369 [2020-10-27 14:29:52,199 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 14:29:52,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:29:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 14:29:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-27 14:29:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 14:29:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 213 transitions. [2020-10-27 14:29:52,209 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 213 transitions. Word has length 198 [2020-10-27 14:29:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:52,209 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 213 transitions. [2020-10-27 14:29:52,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:29:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 213 transitions. [2020-10-27 14:29:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-27 14:29:52,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:52,211 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:52,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:29:52,211 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash 413495998, now seen corresponding path program 36 times [2020-10-27 14:29:52,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:52,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550368991] [2020-10-27 14:29:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:54,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-27 14:29:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:29:57,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:58,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:58,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:58,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:58,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:58,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-10-27 14:29:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550368991] [2020-10-27 14:29:58,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:58,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:29:58,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204439469] [2020-10-27 14:29:58,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:29:58,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:29:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:29:58,259 INFO L87 Difference]: Start difference. First operand 208 states and 213 transitions. Second operand 40 states. [2020-10-27 14:29:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:58,812 INFO L93 Difference]: Finished difference Result 378 states and 392 transitions. [2020-10-27 14:29:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:29:58,813 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 203 [2020-10-27 14:29:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:58,814 INFO L225 Difference]: With dead ends: 378 [2020-10-27 14:29:58,814 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 14:29:58,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:29:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 14:29:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-10-27 14:29:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:29:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 218 transitions. [2020-10-27 14:29:58,823 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 218 transitions. Word has length 203 [2020-10-27 14:29:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:58,823 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 218 transitions. [2020-10-27 14:29:58,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:29:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 218 transitions. [2020-10-27 14:29:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 14:29:58,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:58,825 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:58,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:29:58,825 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash -265553634, now seen corresponding path program 37 times [2020-10-27 14:29:58,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:58,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008058018] [2020-10-27 14:29:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 14:30:03,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:30:03,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:30:03,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-27 14:30:03,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:30:03,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:04,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:04,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:04,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:04,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:04,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-10-27 14:30:04,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008058018] [2020-10-27 14:30:04,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:04,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:30:04,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142793658] [2020-10-27 14:30:04,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:30:04,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:04,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:30:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:30:04,938 INFO L87 Difference]: Start difference. First operand 213 states and 218 transitions. Second operand 41 states. [2020-10-27 14:30:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:05,619 INFO L93 Difference]: Finished difference Result 387 states and 401 transitions. [2020-10-27 14:30:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:30:05,620 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 208 [2020-10-27 14:30:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:05,621 INFO L225 Difference]: With dead ends: 387 [2020-10-27 14:30:05,622 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 14:30:05,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:30:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 14:30:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-10-27 14:30:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-27 14:30:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 223 transitions. [2020-10-27 14:30:05,632 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 223 transitions. Word has length 208 [2020-10-27 14:30:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:05,632 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 223 transitions. [2020-10-27 14:30:05,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:30:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 223 transitions. [2020-10-27 14:30:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 14:30:05,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:05,634 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:05,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:30:05,634 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:05,635 INFO L82 PathProgramCache]: Analyzing trace with hash 787613374, now seen corresponding path program 38 times [2020-10-27 14:30:05,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:05,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820138107] [2020-10-27 14:30:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:10,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 14:30:10,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:10,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:30:10,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:10,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:30:10,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-27 14:30:10,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:30:10,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:11,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:11,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:11,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:11,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:11,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:11,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:11,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:11,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:11,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-10-27 14:30:11,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820138107] [2020-10-27 14:30:11,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:11,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:30:11,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027606640] [2020-10-27 14:30:11,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:30:11,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:30:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:30:11,797 INFO L87 Difference]: Start difference. First operand 218 states and 223 transitions. Second operand 42 states. [2020-10-27 14:30:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:12,465 INFO L93 Difference]: Finished difference Result 396 states and 410 transitions. [2020-10-27 14:30:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:30:12,465 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 213 [2020-10-27 14:30:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:12,467 INFO L225 Difference]: With dead ends: 396 [2020-10-27 14:30:12,467 INFO L226 Difference]: Without dead ends: 223 [2020-10-27 14:30:12,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:30:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-27 14:30:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-27 14:30:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 14:30:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 228 transitions. [2020-10-27 14:30:12,477 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 228 transitions. Word has length 213 [2020-10-27 14:30:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:12,477 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 228 transitions. [2020-10-27 14:30:12,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:30:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 228 transitions. [2020-10-27 14:30:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 14:30:12,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:12,479 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:12,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:30:12,479 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1243876450, now seen corresponding path program 39 times [2020-10-27 14:30:12,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:12,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425230802] [2020-10-27 14:30:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:12,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:17,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:17,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 134 [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:30:17,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:18,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:18,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-10-27 14:30:18,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425230802] [2020-10-27 14:30:18,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:18,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:30:18,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287065551] [2020-10-27 14:30:18,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:30:18,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:30:18,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:30:18,624 INFO L87 Difference]: Start difference. First operand 223 states and 228 transitions. Second operand 43 states. [2020-10-27 14:30:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:19,210 INFO L93 Difference]: Finished difference Result 405 states and 419 transitions. [2020-10-27 14:30:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:30:19,211 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 218 [2020-10-27 14:30:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:19,213 INFO L225 Difference]: With dead ends: 405 [2020-10-27 14:30:19,213 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:30:19,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:30:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:30:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-27 14:30:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:30:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-10-27 14:30:19,222 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 218 [2020-10-27 14:30:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:19,223 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-10-27 14:30:19,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:30:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-10-27 14:30:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 14:30:19,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:19,224 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:19,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:30:19,225 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1252981438, now seen corresponding path program 40 times [2020-10-27 14:30:19,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:19,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283129685] [2020-10-27 14:30:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:19,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:20,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking...