/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/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:26:53,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:26:53,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:26:53,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:26:53,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:26:53,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:26:53,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:26:53,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:26:53,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:26:53,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:26:53,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:26:53,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:26:53,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:26:53,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:26:53,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:26:53,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:26:53,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:26:53,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:26:53,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:26:53,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:26:53,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:26:53,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:26:53,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:26:53,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:26:53,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:26:53,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:26:53,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:26:53,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:26:53,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:26:53,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:26:53,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:26:53,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:26:53,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:26:53,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:26:53,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:26:53,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:26:53,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:26:53,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:26:53,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:26:53,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:26:53,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:26:53,606 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 20:26:53,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:26:53,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:26:53,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:26:53,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:26:53,660 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:26:53,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:26:53,660 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:26:53,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:26:53,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:26:53,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:26:53,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:26:53,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:26:53,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:26:53,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:26:53,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:26:53,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:26:53,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:26:53,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:26:53,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:26:53,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:26:53,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:26:53,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:26:53,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:26:53,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:26:53,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:26:53,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:26:53,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:26:53,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:26:53,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:26:53,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:26:54,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:26:54,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:26:54,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:26:54,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:26:54,114 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:26:54,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-27 20:26:54,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ba107c0c/5ed21ba5c6da41f6b9255290fd010b7f/FLAG052fe977f [2020-10-27 20:26:54,779 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:26:54,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-27 20:26:54,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ba107c0c/5ed21ba5c6da41f6b9255290fd010b7f/FLAG052fe977f [2020-10-27 20:26:55,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ba107c0c/5ed21ba5c6da41f6b9255290fd010b7f [2020-10-27 20:26:55,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:26:55,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:26:55,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:26:55,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:26:55,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:26:55,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c70c512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55, skipping insertion in model container [2020-10-27 20:26:55,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:26:55,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:26:55,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:26:55,347 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:26:55,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:26:55,375 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:26:55,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55 WrapperNode [2020-10-27 20:26:55,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:26:55,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:26:55,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:26:55,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:26:55,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (1/1) ... [2020-10-27 20:26:55,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:26:55,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:26:55,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:26:55,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:26:55,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (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 20:26:55,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:26:55,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:26:55,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:26:55,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:26:55,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:26:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:26:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:26:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:26:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:26:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:26:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:26:55,691 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:26:55,692 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:26:55,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:26:55 BoogieIcfgContainer [2020-10-27 20:26:55,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:26:55,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:26:55,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:26:55,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:26:55,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:26:55" (1/3) ... [2020-10-27 20:26:55,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618da6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:26:55, skipping insertion in model container [2020-10-27 20:26:55,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:55" (2/3) ... [2020-10-27 20:26:55,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618da6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:26:55, skipping insertion in model container [2020-10-27 20:26:55,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:26:55" (3/3) ... [2020-10-27 20:26:55,702 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2020-10-27 20:26:55,715 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:26:55,720 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:26:55,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:26:55,815 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:26:55,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:26:55,818 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:26:55,818 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:26:55,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:26:55,819 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:26:55,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:26:55,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:26:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 20:26:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:26:55,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:55,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:55,873 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1413113606, now seen corresponding path program 1 times [2020-10-27 20:26:55,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:55,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271343053] [2020-10-27 20:26:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:56,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:56,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:56,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:26:56,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:56,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-27 20:26:56,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:56,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:56,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:26:56,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:56,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:26:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:56,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:56,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:56,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:56,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:56,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:26:56,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:56,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:56,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:56,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:56,546 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 20:26:56,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271343053] [2020-10-27 20:26:56,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:26:56,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:26:56,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037463906] [2020-10-27 20:26:56,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:26:56,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:26:56,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:26:56,576 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 20:26:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:56,638 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-27 20:26:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:26:56,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:26:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:56,647 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:26:56,647 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:26:56,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:26:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:26:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:26:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:26:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 20:26:56,692 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 20:26:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:56,692 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 20:26:56,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:26:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 20:26:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:26:56,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:56,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:56,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:26:56,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1126822096, now seen corresponding path program 1 times [2020-10-27 20:26:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:56,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595846505] [2020-10-27 20:26:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:56,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:56,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:56,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:26:56,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:56,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 20:26:56,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:26:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:26:56,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:56,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:56,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:56,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:56,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:56,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:26:56,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:56,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:56,959 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 20:26:56,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595846505] [2020-10-27 20:26:56,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:26:56,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:26:56,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429046119] [2020-10-27 20:26:56,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:26:56,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:26:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:26:56,964 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2020-10-27 20:26:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:57,063 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-27 20:26:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:26:57,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:26:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:57,064 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:26:57,065 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:26:57,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:26:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:26:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:26:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:26:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:26:57,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 20:26:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:26:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:26:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:26:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:26:57,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:57,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:57,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:26:57,077 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1396654797, now seen corresponding path program 1 times [2020-10-27 20:26:57,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:57,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383233274] [2020-10-27 20:26:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:57,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:26:57,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:57,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 20:26:57,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:26:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:26:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:57,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:57,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:57,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:26:57,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:57,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:57,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383233274] [2020-10-27 20:26:57,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:26:57,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:26:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411544162] [2020-10-27 20:26:57,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:26:57,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:26:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:26:57,453 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 20:26:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:57,526 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 20:26:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:26:57,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 20:26:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:57,527 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:26:57,528 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:26:57,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:26:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:26:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 20:26:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:26:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:26:57,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-27 20:26:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:57,536 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:26:57,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:26:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:26:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:26:57,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:57,537 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:57,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:26:57,538 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1973580632, now seen corresponding path program 1 times [2020-10-27 20:26:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610662493] [2020-10-27 20:26:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:57,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:26:57,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:57,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 20:26:57,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:57,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:26:57,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:57,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:26:57,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:57,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:57,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:57,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:57,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:26:57,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:57,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:57,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:57,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610662493] [2020-10-27 20:26:57,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:57,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:26:57,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316308884] [2020-10-27 20:26:57,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:26:57,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:26:57,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:26:57,784 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 20:26:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:57,891 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-27 20:26:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:26:57,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 20:26:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:57,894 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:26:57,894 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:26:57,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:26:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:26:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-27 20:26:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:26:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 20:26:57,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-27 20:26:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:57,901 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 20:26:57,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:26:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 20:26:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:26:57,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:57,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:57,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:26:57,903 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1930480579, now seen corresponding path program 2 times [2020-10-27 20:26:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:57,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118156834] [2020-10-27 20:26:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:58,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:26:58,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:58,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-27 20:26:58,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:26:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:26:58,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:58,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:58,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:58,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:58,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:58,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:26:58,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:58,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118156834] [2020-10-27 20:26:58,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:58,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:26:58,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355818105] [2020-10-27 20:26:58,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:26:58,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:58,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:26:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:26:58,150 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-27 20:26:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:58,290 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-10-27 20:26:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:26:58,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 20:26:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:58,292 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:26:58,292 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:26:58,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:26:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:26:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-27 20:26:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:26:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-27 20:26:58,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-27 20:26:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:58,299 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-27 20:26:58,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:26:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-27 20:26:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:26:58,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:58,300 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:58,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:26:58,300 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash 68112354, now seen corresponding path program 3 times [2020-10-27 20:26:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:58,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772743737] [2020-10-27 20:26:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:58,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:58,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:26:58,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:58,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 20:26:58,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:58,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:26:58,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:58,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:26:58,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:58,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:58,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:58,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:58,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:58,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:26:58,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:58,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:58,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:58,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:58,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772743737] [2020-10-27 20:26:58,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:26:58,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413127644] [2020-10-27 20:26:58,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:26:58,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:58,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:26:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:26:58,556 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-10-27 20:26:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:58,732 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-27 20:26:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:26:58,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 20:26:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:58,733 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:26:58,733 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:26:58,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:26:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:26:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 20:26:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:26:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-27 20:26:58,740 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2020-10-27 20:26:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:58,741 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-27 20:26:58,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:26:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-27 20:26:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:26:58,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:58,742 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:58,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:26:58,742 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash 865539655, now seen corresponding path program 4 times [2020-10-27 20:26:58,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:58,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517248053] [2020-10-27 20:26:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:58,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:59,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:26:59,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:59,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 20:26:59,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:26:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:26:59,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:26:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:59,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:59,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:26:59,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:59,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:59,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517248053] [2020-10-27 20:26:59,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:59,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:26:59,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975511613] [2020-10-27 20:26:59,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:26:59,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:26:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:26:59,118 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-10-27 20:26:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:59,318 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-10-27 20:26:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:26:59,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 20:26:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:59,320 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:26:59,320 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:26:59,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:26:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:26:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 20:26:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:26:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-27 20:26:59,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 22 [2020-10-27 20:26:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:59,327 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-27 20:26:59,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:26:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-27 20:26:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:26:59,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:59,328 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:59,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:26:59,329 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:59,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1605970068, now seen corresponding path program 5 times [2020-10-27 20:26:59,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:59,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367724673] [2020-10-27 20:26:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:59,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:59,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:26:59,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 20:26:59,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:26:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:59,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:26:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:59,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:59,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:59,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:59,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:59,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:59,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:59,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367724673] [2020-10-27 20:26:59,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:59,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:26:59,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220781243] [2020-10-27 20:26:59,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:26:59,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:26:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:26:59,694 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-10-27 20:26:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:59,971 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-27 20:26:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:26:59,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 20:26:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:59,972 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:26:59,972 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:26:59,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:26:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:26:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 20:26:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:26:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-27 20:26:59,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 24 [2020-10-27 20:26:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:59,979 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-27 20:26:59,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:26:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-27 20:26:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:26:59,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:59,981 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:59,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:26:59,981 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:59,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1609899183, now seen corresponding path program 6 times [2020-10-27 20:26:59,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:59,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600826624] [2020-10-27 20:26:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:59,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:00,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:27:00,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 20:27:00,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:27:00,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:00,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:00,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:00,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:00,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:00,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:00,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:00,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:00,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:00,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600826624] [2020-10-27 20:27:00,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:00,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:00,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942847164] [2020-10-27 20:27:00,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:00,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:00,377 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 10 states. [2020-10-27 20:27:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:00,798 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-27 20:27:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:00,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 20:27:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:00,800 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:27:00,800 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:27:00,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:00,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:27:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 20:27:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:27:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-27 20:27:00,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 26 [2020-10-27 20:27:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:00,808 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-27 20:27:00,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-27 20:27:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:27:00,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:00,809 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:00,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:27:00,810 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:00,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1090811402, now seen corresponding path program 7 times [2020-10-27 20:27:00,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:00,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804726301] [2020-10-27 20:27:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:00,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:01,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:01,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:27:01,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-27 20:27:01,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:27:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:01,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:27:01,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:01,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:01,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:01,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:01,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:01,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:01,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804726301] [2020-10-27 20:27:01,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:01,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:27:01,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688584229] [2020-10-27 20:27:01,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:27:01,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:27:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:01,343 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 11 states. [2020-10-27 20:27:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:01,733 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-10-27 20:27:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:27:01,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 20:27:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:01,735 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:27:01,735 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:27:01,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:27:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:27:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 20:27:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:27:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-27 20:27:01,745 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 28 [2020-10-27 20:27:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:01,746 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-27 20:27:01,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:27:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-27 20:27:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:27:01,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:01,749 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:01,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:27:01,750 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash -463660197, now seen corresponding path program 8 times [2020-10-27 20:27:01,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:01,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225284328] [2020-10-27 20:27:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:01,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:01,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:02,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:02,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:27:02,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:02,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-27 20:27:02,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:27:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:27:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:02,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:02,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:02,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:02,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:02,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:02,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225284328] [2020-10-27 20:27:02,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:02,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:27:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18864287] [2020-10-27 20:27:02,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:27:02,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:27:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:27:02,399 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 12 states. [2020-10-27 20:27:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:02,813 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-10-27 20:27:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:27:02,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 20:27:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:02,814 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:27:02,814 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:27:02,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:27:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:27:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 20:27:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:27:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-27 20:27:02,822 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2020-10-27 20:27:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:02,822 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-27 20:27:02,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:27:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-27 20:27:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:27:02,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:02,823 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:02,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:27:02,823 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:02,824 INFO L82 PathProgramCache]: Analyzing trace with hash 933226368, now seen corresponding path program 9 times [2020-10-27 20:27:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:02,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406465071] [2020-10-27 20:27:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:02,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:02,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:03,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:03,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:27:03,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-27 20:27:03,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:27:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:27:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:03,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:03,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:03,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:03,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:03,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:03,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:03,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:03,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:03,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:03,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:03,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406465071] [2020-10-27 20:27:03,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:03,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:27:03,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938191080] [2020-10-27 20:27:03,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:27:03,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:27:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:03,486 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 13 states. [2020-10-27 20:27:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:03,951 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-27 20:27:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:27:03,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 20:27:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:03,953 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:27:03,953 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:27:03,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:27:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:27:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 20:27:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:27:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-27 20:27:03,961 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 32 [2020-10-27 20:27:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:03,961 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-27 20:27:03,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:27:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-27 20:27:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:27:03,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:03,963 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:03,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:27:03,963 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -983548315, now seen corresponding path program 10 times [2020-10-27 20:27:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:03,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201799550] [2020-10-27 20:27:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:03,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:04,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:04,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:04,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:27:04,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:04,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-27 20:27:04,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:27:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:27:04,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:04,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:04,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:04,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:04,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:04,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:04,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:04,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201799550] [2020-10-27 20:27:04,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:04,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:27:04,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621044579] [2020-10-27 20:27:04,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:27:04,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:04,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:27:04,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:27:04,654 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 14 states. [2020-10-27 20:27:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:05,223 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-10-27 20:27:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:27:05,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 20:27:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:05,224 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:27:05,225 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:27:05,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:27:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:27:05,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 20:27:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:27:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-10-27 20:27:05,234 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2020-10-27 20:27:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:05,234 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-10-27 20:27:05,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:27:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-10-27 20:27:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:27:05,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:05,235 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:05,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:27:05,236 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash -463048694, now seen corresponding path program 11 times [2020-10-27 20:27:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:05,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48133229] [2020-10-27 20:27:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:27:05,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-27 20:27:05,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:27:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:27:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:05,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:05,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:05,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:05,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:05,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48133229] [2020-10-27 20:27:05,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:05,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:27:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360009085] [2020-10-27 20:27:05,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:27:05,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:27:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:05,856 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 15 states. [2020-10-27 20:27:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:06,492 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-10-27 20:27:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:27:06,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 20:27:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:06,497 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:27:06,497 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:27:06,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:27:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:27:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 20:27:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:27:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-10-27 20:27:06,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 36 [2020-10-27 20:27:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:06,510 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-10-27 20:27:06,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:27:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-10-27 20:27:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:27:06,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:06,511 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:06,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:27:06,512 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1520880751, now seen corresponding path program 12 times [2020-10-27 20:27:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:06,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191290967] [2020-10-27 20:27:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:06,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:07,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:27:07,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:07,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 20:27:07,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:27:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:27:07,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:07,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:07,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:07,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:07,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:07,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:07,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:07,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:07,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:07,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:07,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191290967] [2020-10-27 20:27:07,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:07,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:27:07,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675528467] [2020-10-27 20:27:07,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:27:07,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:07,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:27:07,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:27:07,347 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 16 states. [2020-10-27 20:27:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:08,026 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-27 20:27:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:27:08,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 20:27:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:08,028 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:27:08,028 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:27:08,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:27:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:27:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 20:27:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:27:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2020-10-27 20:27:08,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 38 [2020-10-27 20:27:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:08,038 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2020-10-27 20:27:08,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:27:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2020-10-27 20:27:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:27:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:08,039 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:08,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:27:08,040 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1111597972, now seen corresponding path program 13 times [2020-10-27 20:27:08,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:08,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667329146] [2020-10-27 20:27:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:08,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:08,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:27:08,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 20:27:08,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:27:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:27:08,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:08,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:08,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:08,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:08,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:27:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:08,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667329146] [2020-10-27 20:27:08,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:08,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:27:08,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336030542] [2020-10-27 20:27:08,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:27:08,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:27:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:08,841 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand 17 states. [2020-10-27 20:27:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:09,504 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-10-27 20:27:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:27:09,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 20:27:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:09,506 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:27:09,507 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:27:09,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:27:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:27:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:27:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:27:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2020-10-27 20:27:09,522 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 40 [2020-10-27 20:27:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:09,525 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2020-10-27 20:27:09,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:27:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2020-10-27 20:27:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:27:09,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:09,526 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:09,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:27:09,526 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1367128711, now seen corresponding path program 14 times [2020-10-27 20:27:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:09,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763309137] [2020-10-27 20:27:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:09,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:10,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:10,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:27:10,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:10,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-27 20:27:10,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:27:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:27:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:10,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:10,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:10,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:10,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:10,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:10,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:10,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 29 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:10,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763309137] [2020-10-27 20:27:10,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:10,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:27:10,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182532356] [2020-10-27 20:27:10,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:27:10,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:10,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:27:10,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:27:10,423 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 18 states. [2020-10-27 20:27:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:11,168 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-27 20:27:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:27:11,169 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 20:27:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:11,169 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:27:11,169 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:27:11,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:27:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:27:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 20:27:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:27:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-10-27 20:27:11,178 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 42 [2020-10-27 20:27:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:11,178 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-10-27 20:27:11,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:27:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-10-27 20:27:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:27:11,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:11,179 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:11,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:27:11,180 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 283378206, now seen corresponding path program 15 times [2020-10-27 20:27:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:11,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749709898] [2020-10-27 20:27:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:11,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:11,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:27:11,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:11,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-27 20:27:11,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:11,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:27:11,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:11,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:27:11,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:11,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:11,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:11,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:11,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 31 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:11,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749709898] [2020-10-27 20:27:11,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:11,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:27:12,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47224318] [2020-10-27 20:27:12,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:27:12,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:27:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:27:12,006 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 19 states. [2020-10-27 20:27:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:12,854 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-10-27 20:27:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:27:12,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 20:27:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:12,855 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:27:12,855 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:27:12,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:27:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:27:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 20:27:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:27:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-27 20:27:12,864 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 44 [2020-10-27 20:27:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:12,864 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-27 20:27:12,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:27:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-27 20:27:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:27:12,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:12,865 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:12,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:27:12,866 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1577593219, now seen corresponding path program 16 times [2020-10-27 20:27:12,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:12,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291830599] [2020-10-27 20:27:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:12,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:13,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:27:13,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-27 20:27:13,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:27:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:27:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:13,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:13,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:13,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:13,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:13,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:13,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:13,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:13,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 33 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:13,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291830599] [2020-10-27 20:27:13,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:13,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:27:13,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858453700] [2020-10-27 20:27:13,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:27:13,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:27:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:27:13,848 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 20 states. [2020-10-27 20:27:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:14,683 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-27 20:27:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:27:14,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-27 20:27:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:14,684 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:27:14,685 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:27:14,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:27:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:27:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 20:27:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:27:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2020-10-27 20:27:14,693 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 46 [2020-10-27 20:27:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:14,694 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2020-10-27 20:27:14,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:27:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2020-10-27 20:27:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:27:14,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:14,695 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:14,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:27:14,695 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash -222295128, now seen corresponding path program 17 times [2020-10-27 20:27:14,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:14,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192525695] [2020-10-27 20:27:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:14,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:14,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:15,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:15,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:15,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:27:15,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:15,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 20:27:15,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:27:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:27:15,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:15,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:15,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192525695] [2020-10-27 20:27:15,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:15,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:27:15,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765945145] [2020-10-27 20:27:15,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:27:15,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:15,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:27:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:27:15,646 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand 21 states. [2020-10-27 20:27:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:16,644 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-10-27 20:27:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:27:16,645 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-27 20:27:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:16,646 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:27:16,646 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 20:27:16,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:27:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 20:27:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 20:27:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:27:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-10-27 20:27:16,656 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 48 [2020-10-27 20:27:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:16,656 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-10-27 20:27:16,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:27:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-10-27 20:27:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:27:16,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:16,657 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:16,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:27:16,657 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash 956823693, now seen corresponding path program 18 times [2020-10-27 20:27:16,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:16,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861293629] [2020-10-27 20:27:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:16,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:17,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:17,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:27:17,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-27 20:27:17,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:17,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:27:17,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:17,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:27:17,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:17,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:17,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 37 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:17,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861293629] [2020-10-27 20:27:17,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:17,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:27:17,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120413541] [2020-10-27 20:27:17,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:27:17,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:17,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:27:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:27:17,763 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 22 states. [2020-10-27 20:27:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:18,871 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-27 20:27:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:27:18,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 20:27:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:18,877 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:27:18,877 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:27:18,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:27:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:27:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-27 20:27:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:27:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-10-27 20:27:18,885 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 50 [2020-10-27 20:27:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:18,885 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-10-27 20:27:18,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:27:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-10-27 20:27:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:27:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:18,886 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:18,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:27:18,887 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash 218644530, now seen corresponding path program 19 times [2020-10-27 20:27:18,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:18,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13481698] [2020-10-27 20:27:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:18,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:19,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:19,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:27:19,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:19,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:19,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:19,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:19,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:19,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:19,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:19,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:19,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:19,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 39 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:19,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13481698] [2020-10-27 20:27:19,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:19,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:27:19,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398785141] [2020-10-27 20:27:19,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:27:19,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:19,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:27:19,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:27:19,964 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 23 states. [2020-10-27 20:27:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:21,087 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-10-27 20:27:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:27:21,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 20:27:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:21,091 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:27:21,091 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 20:27:21,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:27:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 20:27:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-27 20:27:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:27:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2020-10-27 20:27:21,098 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 52 [2020-10-27 20:27:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:21,098 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2020-10-27 20:27:21,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:27:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2020-10-27 20:27:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:27:21,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:21,099 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:21,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:27:21,099 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -501927273, now seen corresponding path program 20 times [2020-10-27 20:27:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:21,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288371499] [2020-10-27 20:27:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:21,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:21,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:27:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:21,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:27:21,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:22,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:22,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:22,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:22,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:22,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:22,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 41 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:22,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288371499] [2020-10-27 20:27:22,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:22,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:27:22,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152053849] [2020-10-27 20:27:22,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:27:22,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:22,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:27:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:27:22,319 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand 24 states. [2020-10-27 20:27:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:23,551 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-10-27 20:27:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:27:23,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-27 20:27:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:23,553 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:27:23,553 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:27:23,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:27:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:27:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 20:27:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:27:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2020-10-27 20:27:23,575 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 54 [2020-10-27 20:27:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:23,575 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2020-10-27 20:27:23,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:27:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2020-10-27 20:27:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:27:23,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:23,578 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:23,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:27:23,578 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1481695300, now seen corresponding path program 21 times [2020-10-27 20:27:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:23,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794704153] [2020-10-27 20:27:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:23,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:23,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:24,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:24,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:27:24,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-27 20:27:24,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:27:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:27:24,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:24,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:24,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:24,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:24,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:24,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:24,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:24,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:24,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:24,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:24,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 43 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794704153] [2020-10-27 20:27:24,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:24,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:27:24,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118717373] [2020-10-27 20:27:24,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:27:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:27:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:27:24,843 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 25 states. [2020-10-27 20:27:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:26,070 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-10-27 20:27:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:27:26,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-27 20:27:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:26,071 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:27:26,071 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 20:27:26,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:27:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 20:27:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-27 20:27:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:27:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2020-10-27 20:27:26,080 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 56 [2020-10-27 20:27:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:26,082 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2020-10-27 20:27:26,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:27:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2020-10-27 20:27:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:27:26,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:26,086 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:26,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:27:26,087 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:26,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1854035873, now seen corresponding path program 22 times [2020-10-27 20:27:26,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:26,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577048822] [2020-10-27 20:27:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:26,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:26,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:27:27,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:27,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:27,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:27,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:27,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 45 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:27,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577048822] [2020-10-27 20:27:27,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:27,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:27:27,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853311622] [2020-10-27 20:27:27,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:27:27,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:27:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:27:27,554 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2020-10-27 20:27:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:28,937 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2020-10-27 20:27:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:27:28,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-27 20:27:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:28,939 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:27:28,939 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:27:28,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:27:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:27:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 20:27:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:27:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-10-27 20:27:28,946 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 58 [2020-10-27 20:27:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:28,947 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-10-27 20:27:28,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:27:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-10-27 20:27:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:27:28,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:28,948 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:28,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:27:28,948 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash -848876986, now seen corresponding path program 23 times [2020-10-27 20:27:28,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:28,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670227598] [2020-10-27 20:27:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:28,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:27:29,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:29,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 20:27:29,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:27:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:27:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:30,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:30,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:30,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:30,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:30,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:30,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 47 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:30,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670227598] [2020-10-27 20:27:30,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:30,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:27:30,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935857560] [2020-10-27 20:27:30,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:27:30,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:27:30,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:27:30,200 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 27 states. [2020-10-27 20:27:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:31,672 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-10-27 20:27:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:27:31,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-27 20:27:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:31,673 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:27:31,673 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:27:31,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:27:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:27:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-27 20:27:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:27:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2020-10-27 20:27:31,680 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 60 [2020-10-27 20:27:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:31,681 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2020-10-27 20:27:31,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:27:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2020-10-27 20:27:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:27:31,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:31,682 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:31,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:27:31,682 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash 107079595, now seen corresponding path program 24 times [2020-10-27 20:27:31,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:31,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531556769] [2020-10-27 20:27:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:32,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:32,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:32,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:27:32,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:32,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-27 20:27:32,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:27:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:27:32,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:33,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:33,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:33,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:33,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:33,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:33,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:33,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 49 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:33,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531556769] [2020-10-27 20:27:33,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:33,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:27:33,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774301457] [2020-10-27 20:27:33,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:27:33,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:27:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:27:33,354 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 28 states. [2020-10-27 20:27:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:34,926 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2020-10-27 20:27:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:27:34,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-27 20:27:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:34,928 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:27:34,928 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 20:27:34,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:27:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 20:27:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-27 20:27:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 20:27:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2020-10-27 20:27:34,936 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 62 [2020-10-27 20:27:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:34,936 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2020-10-27 20:27:34,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:27:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2020-10-27 20:27:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:27:34,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:34,937 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:34,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:27:34,937 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash -341647408, now seen corresponding path program 25 times [2020-10-27 20:27:34,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:34,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114950521] [2020-10-27 20:27:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:27:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:36,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:36,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:36,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:36,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:36,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 51 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:36,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114950521] [2020-10-27 20:27:36,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:36,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:27:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630865250] [2020-10-27 20:27:36,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:27:36,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:27:36,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:27:36,521 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand 29 states. [2020-10-27 20:27:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:38,139 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2020-10-27 20:27:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:27:38,139 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-27 20:27:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:38,140 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:27:38,140 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:27:38,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:27:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:27:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 20:27:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:27:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2020-10-27 20:27:38,148 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 64 [2020-10-27 20:27:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:38,148 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2020-10-27 20:27:38,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:27:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2020-10-27 20:27:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:27:38,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:38,149 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:38,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:27:38,149 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2071567691, now seen corresponding path program 26 times [2020-10-27 20:27:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:38,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240099334] [2020-10-27 20:27:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:38,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:38,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:39,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:27:39,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:39,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1141 [2020-10-27 20:27:39,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:39,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:27:39,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:39,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:27:39,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:39,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:39,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:39,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:39,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:39,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 53 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:39,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240099334] [2020-10-27 20:27:39,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:39,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:27:39,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481240227] [2020-10-27 20:27:39,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:27:39,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:27:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:27:39,917 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand 30 states. [2020-10-27 20:27:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:41,638 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-10-27 20:27:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:27:41,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-27 20:27:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:41,640 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:27:41,640 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:27:41,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:27:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:27:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-27 20:27:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:27:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2020-10-27 20:27:41,647 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 66 [2020-10-27 20:27:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:41,648 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2020-10-27 20:27:41,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:27:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2020-10-27 20:27:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:27:41,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:41,648 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:41,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:27:41,649 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1922351194, now seen corresponding path program 27 times [2020-10-27 20:27:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:41,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173720538] [2020-10-27 20:27:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:41,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:41,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:42,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:42,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:27:42,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-27 20:27:42,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:27:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:27:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:43,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:43,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:43,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:43,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:43,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:43,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 55 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:43,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173720538] [2020-10-27 20:27:43,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:43,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:27:43,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522070944] [2020-10-27 20:27:43,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:27:43,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:27:43,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:27:43,229 INFO L87 Difference]: Start difference. First operand 69 states and 96 transitions. Second operand 31 states. [2020-10-27 20:27:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:45,059 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2020-10-27 20:27:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:27:45,060 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-27 20:27:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:45,061 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:27:45,061 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 20:27:45,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:27:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 20:27:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 20:27:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:27:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2020-10-27 20:27:45,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 68 [2020-10-27 20:27:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:45,069 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2020-10-27 20:27:45,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:27:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2020-10-27 20:27:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:27:45,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:45,070 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:45,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:27:45,070 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash 377637055, now seen corresponding path program 28 times [2020-10-27 20:27:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:45,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470048914] [2020-10-27 20:27:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:45,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:45,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:45,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:27:45,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-27 20:27:45,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:27:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:27:45,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:46,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:46,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:46,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:46,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:46,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:46,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:46,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 57 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:46,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470048914] [2020-10-27 20:27:46,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:46,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:27:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046833039] [2020-10-27 20:27:46,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:27:46,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:27:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:27:46,623 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand 32 states. [2020-10-27 20:27:48,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:48,505 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2020-10-27 20:27:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:27:48,507 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-27 20:27:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:48,508 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:27:48,508 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:27:48,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:27:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:27:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 20:27:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:27:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 102 transitions. [2020-10-27 20:27:48,515 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 102 transitions. Word has length 70 [2020-10-27 20:27:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:48,515 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 102 transitions. [2020-10-27 20:27:48,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:27:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 102 transitions. [2020-10-27 20:27:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:27:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:48,517 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:27:48,517 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1966033892, now seen corresponding path program 29 times [2020-10-27 20:27:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:48,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716373840] [2020-10-27 20:27:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:49,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:27:49,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:49,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-27 20:27:49,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:27:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:27:49,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:50,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:50,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:50,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:50,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:50,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:50,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:50,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:50,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:50,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 59 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:50,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716373840] [2020-10-27 20:27:50,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:50,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:27:50,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373340331] [2020-10-27 20:27:50,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:27:50,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:27:50,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:27:50,429 INFO L87 Difference]: Start difference. First operand 73 states and 102 transitions. Second operand 33 states. [2020-10-27 20:27:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:52,448 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2020-10-27 20:27:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:27:52,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-27 20:27:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:52,450 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:27:52,450 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 20:27:52,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:27:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 20:27:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 20:27:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 20:27:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2020-10-27 20:27:52,458 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 72 [2020-10-27 20:27:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:52,458 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2020-10-27 20:27:52,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:27:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2020-10-27 20:27:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:27:52,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:52,459 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:52,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:27:52,460 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash -592963127, now seen corresponding path program 30 times [2020-10-27 20:27:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:52,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429289448] [2020-10-27 20:27:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:52,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:27:53,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:54,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:54,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:54,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:54,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:54,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:54,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 61 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:54,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429289448] [2020-10-27 20:27:54,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:54,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:27:54,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871522739] [2020-10-27 20:27:54,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:27:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:27:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:27:54,077 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand 34 states. [2020-10-27 20:27:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:56,194 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2020-10-27 20:27:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:27:56,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-27 20:27:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:56,196 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:27:56,198 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 20:27:56,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:27:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 20:27:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-27 20:27:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:27:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2020-10-27 20:27:56,210 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 74 [2020-10-27 20:27:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:56,212 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2020-10-27 20:27:56,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:27:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2020-10-27 20:27:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:27:56,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:56,214 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:56,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:27:56,214 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:56,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1227162222, now seen corresponding path program 31 times [2020-10-27 20:27:56,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:56,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317917109] [2020-10-27 20:27:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:57,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:27:57,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:58,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:58,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:58,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:58,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:58,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:58,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:58,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:58,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:58,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:58,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 63 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:58,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317917109] [2020-10-27 20:27:58,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:58,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:27:58,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588678271] [2020-10-27 20:27:58,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:27:58,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:27:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:27:58,087 INFO L87 Difference]: Start difference. First operand 77 states and 108 transitions. Second operand 35 states. [2020-10-27 20:28:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:00,391 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2020-10-27 20:28:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:28:00,392 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-27 20:28:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:00,393 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:28:00,394 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:28:00,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:28:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:28:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-27 20:28:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:28:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 111 transitions. [2020-10-27 20:28:00,401 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 111 transitions. Word has length 76 [2020-10-27 20:28:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:00,401 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 111 transitions. [2020-10-27 20:28:00,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:28:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2020-10-27 20:28:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:28:00,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:00,402 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:00,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:28:00,402 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1979034157, now seen corresponding path program 32 times [2020-10-27 20:28:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:00,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421425253] [2020-10-27 20:28:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:28:01,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:02,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:02,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:02,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:02,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:02,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:02,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:02,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 65 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:02,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421425253] [2020-10-27 20:28:02,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:02,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:28:02,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586932765] [2020-10-27 20:28:02,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:28:02,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:28:02,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:28:02,301 INFO L87 Difference]: Start difference. First operand 79 states and 111 transitions. Second operand 36 states. [2020-10-27 20:28:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:04,676 INFO L93 Difference]: Finished difference Result 88 states and 122 transitions. [2020-10-27 20:28:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:28:04,679 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-27 20:28:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:04,680 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:28:04,680 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 20:28:04,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:28:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 20:28:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-27 20:28:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 20:28:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2020-10-27 20:28:04,686 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 78 [2020-10-27 20:28:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:04,686 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2020-10-27 20:28:04,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:28:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2020-10-27 20:28:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 20:28:04,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:04,687 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:04,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:28:04,687 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash 652764152, now seen corresponding path program 33 times [2020-10-27 20:28:04,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:04,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286217824] [2020-10-27 20:28:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:05,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:05,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:28:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:06,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:06,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 67 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:06,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286217824] [2020-10-27 20:28:06,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:06,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:28:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726005464] [2020-10-27 20:28:06,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:28:06,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:28:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:28:06,711 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand 37 states. [2020-10-27 20:28:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:09,138 INFO L93 Difference]: Finished difference Result 90 states and 125 transitions. [2020-10-27 20:28:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:28:09,138 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-27 20:28:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:09,139 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:28:09,140 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:28:09,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:28:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:28:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-27 20:28:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:28:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2020-10-27 20:28:09,147 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 80 [2020-10-27 20:28:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:09,148 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2020-10-27 20:28:09,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:28:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2020-10-27 20:28:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:28:09,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:09,148 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:09,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:28:09,149 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 75201757, now seen corresponding path program 34 times [2020-10-27 20:28:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:09,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650648154] [2020-10-27 20:28:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:09,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:09,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:10,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:10,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:28:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:11,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:11,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:11,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:11,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:11,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:11,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:11,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:11,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 69 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:11,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650648154] [2020-10-27 20:28:11,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:11,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:28:11,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907013584] [2020-10-27 20:28:11,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:28:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:28:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:28:11,285 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand 38 states. [2020-10-27 20:28:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:13,727 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2020-10-27 20:28:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:28:13,727 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-27 20:28:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:13,729 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:28:13,729 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:28:13,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:28:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:28:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-27 20:28:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:28:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2020-10-27 20:28:13,736 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 82 [2020-10-27 20:28:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:13,736 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2020-10-27 20:28:13,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:28:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2020-10-27 20:28:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:28:13,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:13,737 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:13,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:28:13,738 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:13,738 INFO L82 PathProgramCache]: Analyzing trace with hash -911478654, now seen corresponding path program 35 times [2020-10-27 20:28:13,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:13,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329861441] [2020-10-27 20:28:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:13,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:14,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:28:14,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:14,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-27 20:28:14,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:28:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:28:14,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:15,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:15,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:15,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:15,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:15,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:15,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:15,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:15,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:15,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:15,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 71 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:15,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329861441] [2020-10-27 20:28:15,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:15,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:28:15,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506441050] [2020-10-27 20:28:15,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:28:15,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:28:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:28:15,991 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand 39 states. [2020-10-27 20:28:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:18,712 INFO L93 Difference]: Finished difference Result 94 states and 131 transitions. [2020-10-27 20:28:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:28:18,713 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-27 20:28:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:18,714 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:28:18,714 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:28:18,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:28:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:28:18,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-27 20:28:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 20:28:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2020-10-27 20:28:18,721 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 84 [2020-10-27 20:28:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:18,721 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2020-10-27 20:28:18,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:28:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2020-10-27 20:28:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:28:18,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:18,722 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:18,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:28:18,722 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash 76418791, now seen corresponding path program 36 times [2020-10-27 20:28:18,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:18,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269000366] [2020-10-27 20:28:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:19,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:19,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:19,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:28:19,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:19,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-27 20:28:19,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:28:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:28:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:21,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:21,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:21,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:21,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 73 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:21,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269000366] [2020-10-27 20:28:21,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:21,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:28:21,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792208075] [2020-10-27 20:28:21,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:28:21,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:28:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:28:21,042 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand 40 states. [2020-10-27 20:28:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:23,769 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2020-10-27 20:28:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:28:23,770 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-27 20:28:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:23,771 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:28:23,771 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:28:23,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:28:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:28:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 20:28:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 20:28:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2020-10-27 20:28:23,779 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 86 [2020-10-27 20:28:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:23,780 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2020-10-27 20:28:23,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:28:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2020-10-27 20:28:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 20:28:23,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:23,781 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:23,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:28:23,781 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 258091020, now seen corresponding path program 37 times [2020-10-27 20:28:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:23,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952150439] [2020-10-27 20:28:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:23,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:24,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:28:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:26,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:26,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:26,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:26,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 75 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:26,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952150439] [2020-10-27 20:28:26,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:26,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:28:26,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706410013] [2020-10-27 20:28:26,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:28:26,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:28:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:28:26,213 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand 41 states. [2020-10-27 20:28:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:29,034 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2020-10-27 20:28:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:28:29,035 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-27 20:28:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:29,036 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:28:29,036 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 20:28:29,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:28:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 20:28:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-27 20:28:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:28:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 129 transitions. [2020-10-27 20:28:29,049 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 129 transitions. Word has length 88 [2020-10-27 20:28:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:29,049 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 129 transitions. [2020-10-27 20:28:29,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:28:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 129 transitions. [2020-10-27 20:28:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:28:29,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:29,050 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:29,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:28:29,050 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1248556047, now seen corresponding path program 38 times [2020-10-27 20:28:29,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:29,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924553729] [2020-10-27 20:28:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:29,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:29,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:29,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:30,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:30,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:28:30,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:30,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1330 [2020-10-27 20:28:30,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:28:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:28:30,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:31,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:31,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:31,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:31,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:28:31,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 77 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924553729] [2020-10-27 20:28:31,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:31,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:28:31,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281118315] [2020-10-27 20:28:31,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:28:31,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:28:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:28:31,564 INFO L87 Difference]: Start difference. First operand 91 states and 129 transitions. Second operand 42 states. [2020-10-27 20:28:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:34,472 INFO L93 Difference]: Finished difference Result 100 states and 140 transitions. [2020-10-27 20:28:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:28:34,472 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-27 20:28:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:34,474 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:28:34,474 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 20:28:34,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:28:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 20:28:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-27 20:28:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 20:28:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2020-10-27 20:28:34,483 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 90 [2020-10-27 20:28:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:34,484 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2020-10-27 20:28:34,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:28:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2020-10-27 20:28:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 20:28:34,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:34,485 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:34,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:28:34,485 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1732408682, now seen corresponding path program 39 times [2020-10-27 20:28:34,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:34,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765337825] [2020-10-27 20:28:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:34,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:35,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:35,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:28:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:37,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:37,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:37,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:37,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:37,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:37,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:37,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:37,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:37,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:37,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 79 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:37,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765337825] [2020-10-27 20:28:37,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:37,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:28:37,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215921587] [2020-10-27 20:28:37,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:28:37,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:28:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:28:37,069 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand 43 states. [2020-10-27 20:28:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:40,135 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2020-10-27 20:28:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:28:40,135 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-27 20:28:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:40,136 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:28:40,136 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 20:28:40,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:28:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 20:28:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-27 20:28:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 20:28:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 135 transitions. [2020-10-27 20:28:40,145 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 135 transitions. Word has length 92 [2020-10-27 20:28:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:40,146 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 135 transitions. [2020-10-27 20:28:40,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:28:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 135 transitions. [2020-10-27 20:28:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 20:28:40,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:40,147 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:40,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:28:40,147 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1436644347, now seen corresponding path program 40 times [2020-10-27 20:28:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:40,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810311311] [2020-10-27 20:28:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:40,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:41,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:41,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 20:28:41,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:41,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-27 20:28:41,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:28:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:28:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:42,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:42,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:42,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:42,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:42,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:42,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:42,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:42,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 81 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:42,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810311311] [2020-10-27 20:28:42,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:42,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:28:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559129580] [2020-10-27 20:28:42,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:28:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:28:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:28:42,799 INFO L87 Difference]: Start difference. First operand 95 states and 135 transitions. Second operand 44 states. [2020-10-27 20:28:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:46,062 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2020-10-27 20:28:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:28:46,062 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-27 20:28:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:46,064 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:28:46,064 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:28:46,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:28:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:28:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 20:28:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:28:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2020-10-27 20:28:46,073 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 94 [2020-10-27 20:28:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:46,073 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2020-10-27 20:28:46,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:28:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2020-10-27 20:28:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 20:28:46,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:46,074 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:46,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:28:46,074 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1764792352, now seen corresponding path program 41 times [2020-10-27 20:28:46,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:46,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614306775] [2020-10-27 20:28:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:28:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:48,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:48,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:48,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:48,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 83 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:48,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614306775] [2020-10-27 20:28:48,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:48,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:28:48,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695909886] [2020-10-27 20:28:48,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:28:48,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:28:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:28:48,940 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand 45 states. [2020-10-27 20:28:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:52,217 INFO L93 Difference]: Finished difference Result 106 states and 149 transitions. [2020-10-27 20:28:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:28:52,217 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-27 20:28:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:52,219 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:28:52,219 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:28:52,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:28:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:28:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-27 20:28:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 20:28:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2020-10-27 20:28:52,228 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 96 [2020-10-27 20:28:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:52,228 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2020-10-27 20:28:52,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:28:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2020-10-27 20:28:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 20:28:52,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:52,229 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:52,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:28:52,229 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash -712554747, now seen corresponding path program 42 times [2020-10-27 20:28:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521676663] [2020-10-27 20:28:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:52,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:53,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 20:28:53,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:53,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1464 [2020-10-27 20:28:53,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:53,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:28:53,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:53,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:28:53,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:55,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:55,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:55,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:55,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:55,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:55,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:55,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:55,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 85 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:55,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521676663] [2020-10-27 20:28:55,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:55,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:28:55,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018677844] [2020-10-27 20:28:55,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:28:55,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:28:55,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:28:55,138 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand 46 states. [2020-10-27 20:28:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:58,587 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2020-10-27 20:28:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:28:58,588 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-27 20:28:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:58,590 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:28:58,590 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 20:28:58,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:28:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 20:28:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-27 20:28:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:28:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 144 transitions. [2020-10-27 20:28:58,598 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 144 transitions. Word has length 98 [2020-10-27 20:28:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:58,598 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 144 transitions. [2020-10-27 20:28:58,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:28:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 144 transitions. [2020-10-27 20:28:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 20:28:58,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:58,599 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:58,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:28:58,600 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:58,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2031234902, now seen corresponding path program 43 times [2020-10-27 20:28:58,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:58,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90597985] [2020-10-27 20:28:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:58,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:00,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:00,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 20:29:00,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:00,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1751 [2020-10-27 20:29:00,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:00,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:29:00,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:00,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 20:29:00,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:01,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:01,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:01,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:01,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:01,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:01,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:01,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:01,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:01,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:01,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:01,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 87 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:01,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90597985] [2020-10-27 20:29:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:01,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:29:01,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461628955] [2020-10-27 20:29:01,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:29:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:29:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:29:01,857 INFO L87 Difference]: Start difference. First operand 101 states and 144 transitions. Second operand 47 states. [2020-10-27 20:29:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:05,472 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2020-10-27 20:29:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:29:05,473 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-27 20:29:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:05,474 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:29:05,475 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 20:29:05,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:29:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 20:29:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-27 20:29:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 20:29:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 147 transitions. [2020-10-27 20:29:05,491 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 147 transitions. Word has length 100 [2020-10-27 20:29:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:05,492 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 147 transitions. [2020-10-27 20:29:05,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:29:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 147 transitions. [2020-10-27 20:29:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 20:29:05,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:05,493 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:05,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:29:05,493 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2027455759, now seen corresponding path program 44 times [2020-10-27 20:29:05,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:05,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739121731] [2020-10-27 20:29:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:05,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:05,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:06,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:07,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:07,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 20:29:07,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:07,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-10-27 20:29:07,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:07,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:29:07,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:07,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 20:29:07,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:08,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:08,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:08,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 89 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:08,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739121731] [2020-10-27 20:29:08,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:08,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:29:08,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206805610] [2020-10-27 20:29:08,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:29:08,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:08,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:29:08,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:29:08,730 INFO L87 Difference]: Start difference. First operand 103 states and 147 transitions. Second operand 48 states. [2020-10-27 20:29:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:12,448 INFO L93 Difference]: Finished difference Result 112 states and 158 transitions. [2020-10-27 20:29:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:29:12,448 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-27 20:29:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:12,450 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:29:12,450 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 20:29:12,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:29:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 20:29:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-27 20:29:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 20:29:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 150 transitions. [2020-10-27 20:29:12,459 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 150 transitions. Word has length 102 [2020-10-27 20:29:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:12,459 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 150 transitions. [2020-10-27 20:29:12,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:29:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 150 transitions. [2020-10-27 20:29:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 20:29:12,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:12,460 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:12,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:29:12,461 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1696091084, now seen corresponding path program 45 times [2020-10-27 20:29:12,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:12,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875405744] [2020-10-27 20:29:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:12,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:12,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:13,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 20:29:14,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-27 20:29:14,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:29:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:29:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:15,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:15,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:15,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:15,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:15,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:15,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 91 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:15,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875405744] [2020-10-27 20:29:15,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:15,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:29:15,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79584440] [2020-10-27 20:29:15,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:29:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:29:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:29:15,900 INFO L87 Difference]: Start difference. First operand 105 states and 150 transitions. Second operand 49 states. [2020-10-27 20:29:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:19,786 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2020-10-27 20:29:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:29:19,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-27 20:29:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:19,789 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:29:19,789 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 20:29:19,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:29:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 20:29:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-27 20:29:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:29:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2020-10-27 20:29:19,797 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 104 [2020-10-27 20:29:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:19,797 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2020-10-27 20:29:19,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:29:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2020-10-27 20:29:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 20:29:19,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:19,798 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:19,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:29:19,798 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1978117657, now seen corresponding path program 46 times [2020-10-27 20:29:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:19,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557712327] [2020-10-27 20:29:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1777 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 20:29:21,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:23,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 93 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:23,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557712327] [2020-10-27 20:29:23,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:23,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:29:23,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911016657] [2020-10-27 20:29:23,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:29:23,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:29:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:29:23,327 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand 50 states. [2020-10-27 20:29:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:27,368 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2020-10-27 20:29:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:29:27,368 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-27 20:29:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:27,370 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:29:27,370 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 20:29:27,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:29:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 20:29:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-27 20:29:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 20:29:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 156 transitions. [2020-10-27 20:29:27,378 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 156 transitions. Word has length 106 [2020-10-27 20:29:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:27,378 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 156 transitions. [2020-10-27 20:29:27,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:29:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 156 transitions. [2020-10-27 20:29:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 20:29:27,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:27,379 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:27,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:29:27,379 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:27,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1865366850, now seen corresponding path program 47 times [2020-10-27 20:29:27,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:27,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735491077] [2020-10-27 20:29:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2024 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:29:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:31,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:31,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 95 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:31,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735491077] [2020-10-27 20:29:31,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:31,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:29:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394501250] [2020-10-27 20:29:31,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:29:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:29:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:29:31,206 INFO L87 Difference]: Start difference. First operand 109 states and 156 transitions. Second operand 51 states. [2020-10-27 20:29:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:35,411 INFO L93 Difference]: Finished difference Result 118 states and 167 transitions. [2020-10-27 20:29:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:29:35,412 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-27 20:29:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:35,414 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:29:35,414 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 20:29:35,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:29:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 20:29:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-27 20:29:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 20:29:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2020-10-27 20:29:35,424 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 108 [2020-10-27 20:29:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:35,424 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2020-10-27 20:29:35,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:29:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2020-10-27 20:29:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 20:29:35,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:35,425 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:35,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:29:35,425 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:35,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1782103517, now seen corresponding path program 48 times [2020-10-27 20:29:35,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:35,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953205015] [2020-10-27 20:29:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:37,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:37,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 20:29:37,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-27 20:29:37,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:37,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:29:37,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:37,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 20:29:37,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:39,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:39,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:39,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:39,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:39,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:39,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 97 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:39,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953205015] [2020-10-27 20:29:39,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:39,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:29:39,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630250213] [2020-10-27 20:29:39,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:29:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:29:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:29:39,347 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand 52 states. [2020-10-27 20:29:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:43,688 INFO L93 Difference]: Finished difference Result 120 states and 170 transitions. [2020-10-27 20:29:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:29:43,689 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-27 20:29:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:43,690 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:29:43,691 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 20:29:43,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:29:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 20:29:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-27 20:29:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 20:29:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 162 transitions. [2020-10-27 20:29:43,697 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 162 transitions. Word has length 110 [2020-10-27 20:29:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:43,697 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 162 transitions. [2020-10-27 20:29:43,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:29:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 162 transitions. [2020-10-27 20:29:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 20:29:43,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:43,698 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:43,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:29:43,699 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash 924548168, now seen corresponding path program 49 times [2020-10-27 20:29:43,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:43,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947644454] [2020-10-27 20:29:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:43,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:43,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2086 [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 20:29:45,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:47,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:47,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:47,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:47,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:47,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:47,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:47,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:47,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:47,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 99 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:47,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947644454] [2020-10-27 20:29:47,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:47,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:29:47,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059372385] [2020-10-27 20:29:47,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:29:47,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:47,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:29:47,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:29:47,747 INFO L87 Difference]: Start difference. First operand 113 states and 162 transitions. Second operand 53 states. [2020-10-27 20:29:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:52,220 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2020-10-27 20:29:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:29:52,221 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-27 20:29:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:52,222 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:29:52,222 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 20:29:52,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:29:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 20:29:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-27 20:29:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 20:29:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 165 transitions. [2020-10-27 20:29:52,231 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 165 transitions. Word has length 112 [2020-10-27 20:29:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:52,232 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 165 transitions. [2020-10-27 20:29:52,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:29:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 165 transitions. [2020-10-27 20:29:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 20:29:52,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:52,233 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:52,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:29:52,233 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash -733363923, now seen corresponding path program 50 times [2020-10-27 20:29:52,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:52,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902413860] [2020-10-27 20:29:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 20:29:54,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:56,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:56,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:56,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:56,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:56,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:29:56,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 101 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:56,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902413860] [2020-10-27 20:29:56,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:56,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:29:56,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33983209] [2020-10-27 20:29:56,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:29:56,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:29:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:29:56,379 INFO L87 Difference]: Start difference. First operand 115 states and 165 transitions. Second operand 54 states. [2020-10-27 20:30:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:01,040 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2020-10-27 20:30:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:30:01,041 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-27 20:30:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:01,042 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:30:01,042 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 20:30:01,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 20:30:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 20:30:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-27 20:30:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:30:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 168 transitions. [2020-10-27 20:30:01,051 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 168 transitions. Word has length 114 [2020-10-27 20:30:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:01,051 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 168 transitions. [2020-10-27 20:30:01,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:30:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 168 transitions. [2020-10-27 20:30:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 20:30:01,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:01,052 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:01,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:30:01,053 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash -554016558, now seen corresponding path program 51 times [2020-10-27 20:30:01,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:01,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140080497] [2020-10-27 20:30:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:01,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:01,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:03,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 20:30:03,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:05,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:05,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:05,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:05,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:05,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:05,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:05,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 103 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:05,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140080497] [2020-10-27 20:30:05,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:05,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:30:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674620942] [2020-10-27 20:30:05,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:30:05,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:30:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:30:05,528 INFO L87 Difference]: Start difference. First operand 117 states and 168 transitions. Second operand 55 states. [2020-10-27 20:30:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:10,272 INFO L93 Difference]: Finished difference Result 126 states and 179 transitions. [2020-10-27 20:30:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:30:10,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 116 [2020-10-27 20:30:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:10,274 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:30:10,274 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 20:30:10,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 20:30:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 20:30:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-27 20:30:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 20:30:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 171 transitions. [2020-10-27 20:30:10,284 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 171 transitions. Word has length 116 [2020-10-27 20:30:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:10,284 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 171 transitions. [2020-10-27 20:30:10,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:30:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 171 transitions. [2020-10-27 20:30:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 20:30:10,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:10,285 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:10,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:30:10,286 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash 109367, now seen corresponding path program 52 times [2020-10-27 20:30:10,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:10,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094652692] [2020-10-27 20:30:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:10,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 20:30:12,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:14,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:14,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 105 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:14,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094652692] [2020-10-27 20:30:14,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:14,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:30:14,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277760167] [2020-10-27 20:30:14,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:30:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:30:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:30:14,779 INFO L87 Difference]: Start difference. First operand 119 states and 171 transitions. Second operand 56 states. [2020-10-27 20:30:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:19,784 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2020-10-27 20:30:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 20:30:19,784 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 118 [2020-10-27 20:30:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:19,786 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:30:19,786 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 20:30:19,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 20:30:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 20:30:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-27 20:30:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 20:30:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 174 transitions. [2020-10-27 20:30:19,795 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 174 transitions. Word has length 118 [2020-10-27 20:30:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:19,795 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 174 transitions. [2020-10-27 20:30:19,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 20:30:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 174 transitions. [2020-10-27 20:30:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 20:30:19,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:19,797 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:19,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:30:19,797 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -60821412, now seen corresponding path program 53 times [2020-10-27 20:30:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:19,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882606322] [2020-10-27 20:30:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:19,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2706 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 20:30:22,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:24,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:24,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:24,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:24,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:24,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:24,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 107 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:24,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882606322] [2020-10-27 20:30:24,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:24,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 20:30:24,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943126628] [2020-10-27 20:30:24,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 20:30:24,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 20:30:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:30:24,791 INFO L87 Difference]: Start difference. First operand 121 states and 174 transitions. Second operand 57 states. [2020-10-27 20:30:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:30,035 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2020-10-27 20:30:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 20:30:30,036 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 120 [2020-10-27 20:30:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:30,037 INFO L225 Difference]: With dead ends: 130 [2020-10-27 20:30:30,037 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 20:30:30,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 20:30:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 20:30:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-27 20:30:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 20:30:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 177 transitions. [2020-10-27 20:30:30,047 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 177 transitions. Word has length 120 [2020-10-27 20:30:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:30,047 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 177 transitions. [2020-10-27 20:30:30,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 20:30:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 177 transitions. [2020-10-27 20:30:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 20:30:30,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:30,048 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:30,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:30:30,048 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1514242113, now seen corresponding path program 54 times [2020-10-27 20:30:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:30,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245057340] [2020-10-27 20:30:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:31,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 20:30:32,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2611 [2020-10-27 20:30:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:30:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 20:30:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:35,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:35,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:35,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:35,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:35,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:35,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 109 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:35,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245057340] [2020-10-27 20:30:35,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:35,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 20:30:35,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046171760] [2020-10-27 20:30:35,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 20:30:35,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 20:30:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:30:35,046 INFO L87 Difference]: Start difference. First operand 123 states and 177 transitions. Second operand 58 states. [2020-10-27 20:30:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:40,313 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2020-10-27 20:30:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 20:30:40,313 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 122 [2020-10-27 20:30:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:40,315 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:30:40,315 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 20:30:40,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 20:30:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 20:30:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-27 20:30:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 20:30:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 180 transitions. [2020-10-27 20:30:40,326 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 180 transitions. Word has length 122 [2020-10-27 20:30:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:40,326 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 180 transitions. [2020-10-27 20:30:40,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 20:30:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 180 transitions. [2020-10-27 20:30:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 20:30:40,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:40,327 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:40,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:30:40,327 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -973165850, now seen corresponding path program 55 times [2020-10-27 20:30:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:40,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842505957] [2020-10-27 20:30:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:43,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2781 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 20:30:43,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:45,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 111 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:45,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842505957] [2020-10-27 20:30:45,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:45,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 20:30:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585915050] [2020-10-27 20:30:45,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 20:30:45,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 20:30:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:30:45,590 INFO L87 Difference]: Start difference. First operand 125 states and 180 transitions. Second operand 59 states.