/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:22:40,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:22:40,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:22:40,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:22:40,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:22:40,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:22:40,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:22:40,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:22:40,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:22:40,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:22:40,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:22:40,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:22:40,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:22:40,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:22:40,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:22:40,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:22:40,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:22:40,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:22:40,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:22:40,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:22:40,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:22:40,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:22:40,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:22:40,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:22:40,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:22:40,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:22:40,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:22:40,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:22:40,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:22:40,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:22:40,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:22:40,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:22:40,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:22:40,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:22:40,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:22:40,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:22:40,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:22:40,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:22:40,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:22:40,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:22:40,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:22:40,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:22:40,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:22:40,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:22:40,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:22:40,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:22:40,719 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:22:40,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:22:40,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:22:40,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:22:40,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:22:40,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:22:40,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:22:40,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:22:40,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:22:40,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:22:40,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:22:40,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:22:40,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:22:40,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:22:40,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:22:40,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:22:40,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:22:40,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:22:40,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:22:40,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:22:40,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:22:40,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:22:40,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:22:40,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:22:40,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:22:40,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:22:41,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:22:41,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:22:41,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:22:41,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:22:41,129 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:22:41,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2020-10-27 14:22:41,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f5243d30/c3d26ac1983840c791e6d64b1a858040/FLAG23e093c11 [2020-10-27 14:22:41,863 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:22:41,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2020-10-27 14:22:41,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f5243d30/c3d26ac1983840c791e6d64b1a858040/FLAG23e093c11 [2020-10-27 14:22:42,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f5243d30/c3d26ac1983840c791e6d64b1a858040 [2020-10-27 14:22:42,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:22:42,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:22:42,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:22:42,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:22:42,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:22:42,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42aa32c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42, skipping insertion in model container [2020-10-27 14:22:42,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:22:42,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:22:42,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:22:42,438 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:22:42,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:22:42,476 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:22:42,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42 WrapperNode [2020-10-27 14:22:42,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:22:42,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:22:42,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:22:42,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:22:42,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... [2020-10-27 14:22:42,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:22:42,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:22:42,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:22:42,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:22:42,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:22:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:22:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:22:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:22:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:22:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:22:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:22:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:22:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:22:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:22:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:22:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:22:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:22:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:22:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:22:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:22:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:22:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:22:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:22:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:22:43,053 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:22:43,053 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:22:43,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:22:43 BoogieIcfgContainer [2020-10-27 14:22:43,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:22:43,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:22:43,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:22:43,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:22:43,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:22:42" (1/3) ... [2020-10-27 14:22:43,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc125da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:22:43, skipping insertion in model container [2020-10-27 14:22:43,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:22:42" (2/3) ... [2020-10-27 14:22:43,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc125da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:22:43, skipping insertion in model container [2020-10-27 14:22:43,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:22:43" (3/3) ... [2020-10-27 14:22:43,071 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2020-10-27 14:22:43,085 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:22:43,090 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:22:43,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:22:43,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:22:43,177 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:22:43,177 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:22:43,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:22:43,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:22:43,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:22:43,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:22:43,178 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:22:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 14:22:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 14:22:43,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:43,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:43,214 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:43,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1010338642, now seen corresponding path program 1 times [2020-10-27 14:22:43,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:43,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876631486] [2020-10-27 14:22:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:43,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:43,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:43,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 14:22:43,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 14:22:43,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:22:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:43,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:22:43,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:22:43,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:43,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:43,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:43,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:43,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:43,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:22:43,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:43,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:43,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:43,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:43,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876631486] [2020-10-27 14:22:43,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:22:43,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:22:43,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577617436] [2020-10-27 14:22:43,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:22:43,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:22:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:22:43,804 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-27 14:22:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:43,903 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-27 14:22:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:22:43,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 14:22:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:43,913 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:22:43,913 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 14:22:43,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:22:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 14:22:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 14:22:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 14:22:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 14:22:43,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-27 14:22:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:43,961 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 14:22:43,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:22:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 14:22:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 14:22:43,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:43,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:43,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:22:43,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1740012936, now seen corresponding path program 1 times [2020-10-27 14:22:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:43,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124806681] [2020-10-27 14:22:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:43,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:44,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:44,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 14:22:44,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:44,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 14:22:44,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:22:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:22:44,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:44,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:44,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:44,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:44,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:22:44,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:44,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:44,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:44,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124806681] [2020-10-27 14:22:44,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:44,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:22:44,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194266600] [2020-10-27 14:22:44,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:22:44,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:22:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:22:44,171 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-27 14:22:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:44,243 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-27 14:22:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:22:44,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 14:22:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:44,245 INFO L225 Difference]: With dead ends: 35 [2020-10-27 14:22:44,245 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 14:22:44,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:22:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 14:22:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 14:22:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 14:22:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 14:22:44,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-27 14:22:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:44,254 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 14:22:44,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:22:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 14:22:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:22:44,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:44,255 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:44,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:22:44,256 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1409887726, now seen corresponding path program 2 times [2020-10-27 14:22:44,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:44,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737520912] [2020-10-27 14:22:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:44,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:44,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:22:44,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:44,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 14:22:44,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:22:44,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:44,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:22:44,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:44,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:44,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:44,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:44,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:22:44,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:44,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:44,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737520912] [2020-10-27 14:22:44,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:44,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:22:44,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009256987] [2020-10-27 14:22:44,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:22:44,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:22:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:22:44,509 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-27 14:22:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:44,578 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-27 14:22:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:22:44,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 14:22:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:44,580 INFO L225 Difference]: With dead ends: 36 [2020-10-27 14:22:44,580 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 14:22:44,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:22:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 14:22:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 14:22:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:22:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 14:22:44,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-10-27 14:22:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:44,588 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 14:22:44,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:22:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 14:22:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:22:44,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:44,589 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:44,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:22:44,589 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash 272560440, now seen corresponding path program 3 times [2020-10-27 14:22:44,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:44,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931778211] [2020-10-27 14:22:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:44,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:44,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:22:44,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:44,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 14:22:44,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:44,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:22:44,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:44,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:22:44,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:44,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:44,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:44,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:44,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:44,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:44,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:22:44,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:44,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:44,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931778211] [2020-10-27 14:22:44,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:44,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:22:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124723033] [2020-10-27 14:22:44,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:22:44,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:22:44,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:22:44,822 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-27 14:22:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:44,920 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 14:22:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:22:44,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 14:22:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:44,922 INFO L225 Difference]: With dead ends: 37 [2020-10-27 14:22:44,922 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 14:22:44,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:22:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 14:22:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 14:22:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 14:22:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-27 14:22:44,929 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-10-27 14:22:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:44,929 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-27 14:22:44,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:22:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-27 14:22:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:22:44,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:44,931 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:44,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:22:44,931 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash -624847058, now seen corresponding path program 4 times [2020-10-27 14:22:44,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:44,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334149905] [2020-10-27 14:22:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:44,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:45,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:45,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:22:45,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 14:22:45,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:22:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:22:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:45,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:45,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:45,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:22:45,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:45,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334149905] [2020-10-27 14:22:45,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:45,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:22:45,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561236942] [2020-10-27 14:22:45,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:22:45,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:45,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:22:45,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:22:45,222 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-27 14:22:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:45,305 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-27 14:22:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:22:45,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 14:22:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:45,307 INFO L225 Difference]: With dead ends: 38 [2020-10-27 14:22:45,307 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 14:22:45,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:22:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 14:22:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 14:22:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:22:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 14:22:45,317 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-10-27 14:22:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:45,321 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 14:22:45,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:22:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 14:22:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:22:45,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:45,323 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:45,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:22:45,323 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1620291576, now seen corresponding path program 5 times [2020-10-27 14:22:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:45,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086737413] [2020-10-27 14:22:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:45,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:45,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:45,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:22:45,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:45,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 14:22:45,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:45,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:22:45,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:22:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:45,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:45,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:45,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:45,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:45,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:45,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:22:45,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:45,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:45,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-27 14:22:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:45,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086737413] [2020-10-27 14:22:45,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:45,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:22:45,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113994650] [2020-10-27 14:22:45,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:22:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:22:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:22:45,666 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-27 14:22:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:45,749 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 14:22:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:22:45,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 14:22:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:45,750 INFO L225 Difference]: With dead ends: 39 [2020-10-27 14:22:45,750 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:22:45,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:22:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:22:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 14:22:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:22:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-27 14:22:45,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-10-27 14:22:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:45,757 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-27 14:22:45,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:22:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-27 14:22:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:22:45,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:45,758 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:45,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:22:45,758 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:45,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1794854802, now seen corresponding path program 6 times [2020-10-27 14:22:45,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:45,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743852003] [2020-10-27 14:22:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:45,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:45,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:45,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:22:45,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:45,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 14:22:45,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:45,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:22:45,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:45,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:22:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:22:46,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:46,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:46,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:22:46,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:46,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:46,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:46,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:46,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743852003] [2020-10-27 14:22:46,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:46,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:22:46,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868138687] [2020-10-27 14:22:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:22:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:22:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:22:46,091 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-27 14:22:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:46,177 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-27 14:22:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:22:46,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 14:22:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:46,178 INFO L225 Difference]: With dead ends: 40 [2020-10-27 14:22:46,178 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:22:46,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:22:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:22:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:22:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:22:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 14:22:46,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-27 14:22:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:46,185 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 14:22:46,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:22:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 14:22:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:22:46,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:46,186 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:46,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:22:46,186 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -290210120, now seen corresponding path program 7 times [2020-10-27 14:22:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:46,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209997744] [2020-10-27 14:22:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 14:22:46,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:46,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 14:22:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:22:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:22:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:46,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:46,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:22:46,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:46,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:46,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209997744] [2020-10-27 14:22:46,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:46,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:22:46,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453318996] [2020-10-27 14:22:46,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:22:46,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:22:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:22:46,545 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-10-27 14:22:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:46,602 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 14:22:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:22:46,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-27 14:22:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:46,604 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:22:46,604 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:22:46,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:22:46,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:22:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:22:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:22:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-27 14:22:46,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2020-10-27 14:22:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:46,610 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-27 14:22:46,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:22:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-27 14:22:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:22:46,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:46,612 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:46,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:22:46,612 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:46,613 INFO L82 PathProgramCache]: Analyzing trace with hash -890865234, now seen corresponding path program 8 times [2020-10-27 14:22:46,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:46,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102286020] [2020-10-27 14:22:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:22:46,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:46,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 14:22:46,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:22:46,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:46,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:22:46,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:46,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:46,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:22:46,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:46,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:46,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102286020] [2020-10-27 14:22:46,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:46,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:22:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969599375] [2020-10-27 14:22:46,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:22:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:22:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:22:46,988 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-10-27 14:22:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:47,113 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 14:22:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:22:47,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 14:22:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:47,114 INFO L225 Difference]: With dead ends: 42 [2020-10-27 14:22:47,114 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:22:47,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:22:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:22:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:22:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:22:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 14:22:47,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2020-10-27 14:22:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:47,124 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 14:22:47,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:22:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 14:22:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:22:47,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:47,125 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:47,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:22:47,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1963662712, now seen corresponding path program 9 times [2020-10-27 14:22:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660838807] [2020-10-27 14:22:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:47,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:47,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:22:47,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 14:22:47,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:22:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:22:47,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:47,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:47,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:47,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:47,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660838807] [2020-10-27 14:22:47,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:47,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:22:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725606193] [2020-10-27 14:22:47,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:22:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:22:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:22:47,511 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2020-10-27 14:22:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:47,604 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-27 14:22:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:22:47,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-27 14:22:47,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:47,606 INFO L225 Difference]: With dead ends: 43 [2020-10-27 14:22:47,606 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 14:22:47,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:22:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 14:22:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 14:22:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:22:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-27 14:22:47,612 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-10-27 14:22:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:47,612 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-27 14:22:47,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:22:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-27 14:22:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:22:47,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:47,614 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:47,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:22:47,614 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:47,615 INFO L82 PathProgramCache]: Analyzing trace with hash 259715822, now seen corresponding path program 10 times [2020-10-27 14:22:47,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:47,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128336685] [2020-10-27 14:22:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:47,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:47,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:47,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:22:47,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 14:22:47,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:22:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:22:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:47,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:47,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:47,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:47,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:47,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:47,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:47,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:47,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128336685] [2020-10-27 14:22:47,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:47,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:22:47,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885086120] [2020-10-27 14:22:47,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:22:47,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:47,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:22:47,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:22:47,988 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-10-27 14:22:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:48,066 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-27 14:22:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:22:48,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-27 14:22:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:48,067 INFO L225 Difference]: With dead ends: 44 [2020-10-27 14:22:48,067 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:22:48,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:22:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:22:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 14:22:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:22:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 14:22:48,073 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-27 14:22:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:48,073 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 14:22:48,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:22:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 14:22:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 14:22:48,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:48,074 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:48,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:22:48,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:48,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1023030216, now seen corresponding path program 11 times [2020-10-27 14:22:48,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:48,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207435125] [2020-10-27 14:22:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:48,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:48,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:48,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:22:48,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:48,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 14:22:48,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:22:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:22:48,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:48,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:48,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:48,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:48,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:48,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:48,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:48,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:48,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207435125] [2020-10-27 14:22:48,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:48,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:22:48,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522948099] [2020-10-27 14:22:48,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:22:48,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:48,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:22:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:22:48,554 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2020-10-27 14:22:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:48,617 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-27 14:22:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:22:48,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-27 14:22:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:48,618 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:22:48,618 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:22:48,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:22:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:22:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:22:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:22:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 14:22:48,624 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-27 14:22:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:48,624 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 14:22:48,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:22:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 14:22:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:22:48,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:48,626 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:48,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:22:48,626 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2133451730, now seen corresponding path program 12 times [2020-10-27 14:22:48,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:48,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871547373] [2020-10-27 14:22:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:48,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:48,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:48,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:22:48,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:48,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 14:22:48,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:22:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:48,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:22:48,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:22:49,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:49,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:49,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:49,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:49,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:49,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:22:49,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:49,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:49,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:49,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:49,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:22:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:49,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871547373] [2020-10-27 14:22:49,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:49,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:22:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773619697] [2020-10-27 14:22:49,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:22:49,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:49,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:22:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:22:49,179 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-10-27 14:22:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:49,314 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-27 14:22:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:22:49,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-27 14:22:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:49,316 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:22:49,316 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 14:22:49,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:22:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 14:22:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 14:22:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:22:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 14:22:49,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2020-10-27 14:22:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:49,324 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 14:22:49,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:22:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 14:22:49,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:22:49,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:49,327 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:49,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:22:49,327 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2098187000, now seen corresponding path program 13 times [2020-10-27 14:22:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:49,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438733327] [2020-10-27 14:22:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:49,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:22:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:49,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:22:49,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:49,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:49,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:49,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:49,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:49,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:49,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:22:49,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:49,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:49,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:49,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:49,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438733327] [2020-10-27 14:22:49,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:49,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:22:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038617704] [2020-10-27 14:22:49,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:22:49,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:22:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:22:49,964 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-10-27 14:22:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:50,091 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-27 14:22:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:22:50,091 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-27 14:22:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:50,092 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:22:50,092 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:22:50,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:22:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:22:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 14:22:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:22:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-27 14:22:50,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-10-27 14:22:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:50,102 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-27 14:22:50,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:22:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-27 14:22:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:22:50,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:50,103 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:50,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:22:50,104 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 135001454, now seen corresponding path program 14 times [2020-10-27 14:22:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:50,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022446554] [2020-10-27 14:22:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:50,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:50,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:22:50,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:50,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 14:22:50,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:50,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:22:50,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:50,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:22:50,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:50,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:50,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:50,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:50,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:50,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:50,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:22:50,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:50,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:50,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:50,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:50,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:50,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022446554] [2020-10-27 14:22:50,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:50,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:22:50,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330251105] [2020-10-27 14:22:50,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:22:50,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:22:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:22:50,691 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-10-27 14:22:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:50,777 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 14:22:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:22:50,777 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-27 14:22:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:50,778 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:22:50,778 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:22:50,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:22:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:22:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 14:22:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:22:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 14:22:50,785 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2020-10-27 14:22:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:50,786 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 14:22:50,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:22:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 14:22:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:22:50,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:50,789 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:50,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:22:50,790 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash -594208328, now seen corresponding path program 15 times [2020-10-27 14:22:50,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:50,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557847886] [2020-10-27 14:22:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:51,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:51,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:22:51,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-27 14:22:51,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:22:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:22:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:51,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:51,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:51,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:51,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:51,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:51,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:51,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:51,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:51,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557847886] [2020-10-27 14:22:51,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:51,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:22:51,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118523497] [2020-10-27 14:22:51,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:22:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:22:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:22:51,475 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 19 states. [2020-10-27 14:22:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:51,560 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 14:22:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:22:51,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-27 14:22:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:51,561 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:22:51,562 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:22:51,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:22:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:22:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 14:22:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:22:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-27 14:22:51,567 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-10-27 14:22:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:51,568 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-27 14:22:51,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:22:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-27 14:22:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:22:51,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:51,569 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:51,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:22:51,569 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1724875090, now seen corresponding path program 16 times [2020-10-27 14:22:51,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:51,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043040985] [2020-10-27 14:22:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:51,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:51,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:22:51,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 14:22:51,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:22:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:51,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:22:51,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:52,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:52,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:52,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:52,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:22:52,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:52,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:22:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:52,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043040985] [2020-10-27 14:22:52,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:52,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:22:52,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856604295] [2020-10-27 14:22:52,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:22:52,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:52,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:22:52,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:22:52,296 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-10-27 14:22:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:52,456 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-27 14:22:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:22:52,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-27 14:22:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:52,458 INFO L225 Difference]: With dead ends: 50 [2020-10-27 14:22:52,458 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:22:52,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:22:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:22:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 14:22:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:22:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 14:22:52,464 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-27 14:22:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:52,465 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 14:22:52,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:22:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 14:22:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:22:52,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:52,466 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:52,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:22:52,467 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1879160952, now seen corresponding path program 17 times [2020-10-27 14:22:52,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:52,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745210321] [2020-10-27 14:22:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:52,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:52,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:52,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:22:52,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:52,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 14:22:52,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:22:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:52,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:22:52,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:53,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:53,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:53,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:53,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:53,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:53,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:53,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:53,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:53,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:53,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:53,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745210321] [2020-10-27 14:22:53,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:53,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:22:53,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330067588] [2020-10-27 14:22:53,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:22:53,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:53,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:22:53,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:22:53,272 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 21 states. [2020-10-27 14:22:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:53,430 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-27 14:22:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:22:53,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-27 14:22:53,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:53,431 INFO L225 Difference]: With dead ends: 51 [2020-10-27 14:22:53,431 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:22:53,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:22:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:22:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 14:22:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:22:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-27 14:22:53,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-27 14:22:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:53,453 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-27 14:22:53,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:22:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-27 14:22:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:22:53,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:53,454 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:53,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:22:53,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1935128558, now seen corresponding path program 18 times [2020-10-27 14:22:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:53,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801701272] [2020-10-27 14:22:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:53,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:53,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:22:53,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:53,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-27 14:22:53,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:22:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:22:53,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:54,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:54,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:54,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:54,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:54,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:54,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:54,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801701272] [2020-10-27 14:22:54,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:54,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:22:54,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166983098] [2020-10-27 14:22:54,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:22:54,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:22:54,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:22:54,217 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 22 states. [2020-10-27 14:22:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:54,321 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-27 14:22:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:22:54,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-27 14:22:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:54,322 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:22:54,322 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:22:54,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:22:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:22:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 14:22:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:22:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 14:22:54,327 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-10-27 14:22:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:54,328 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 14:22:54,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:22:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 14:22:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:22:54,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:54,329 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:54,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:22:54,329 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash -624842952, now seen corresponding path program 19 times [2020-10-27 14:22:54,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:54,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738650334] [2020-10-27 14:22:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:22:54,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-27 14:22:54,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:22:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:22:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:55,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:55,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:55,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:55,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:55,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:22:55,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:55,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:55,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738650334] [2020-10-27 14:22:55,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:55,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:22:55,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303327557] [2020-10-27 14:22:55,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:22:55,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:22:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:22:55,292 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-10-27 14:22:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:55,469 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 14:22:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:22:55,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-27 14:22:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:55,470 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:22:55,471 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:22:55,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:22:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:22:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 14:22:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:22:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-27 14:22:55,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2020-10-27 14:22:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:55,478 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-27 14:22:55,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:22:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-27 14:22:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:22:55,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:55,480 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:55,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:22:55,480 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1620418862, now seen corresponding path program 20 times [2020-10-27 14:22:55,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:55,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202267577] [2020-10-27 14:22:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:55,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:56,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:56,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:22:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:56,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:56,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:56,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:56,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:56,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:56,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:22:56,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:56,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:56,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:56,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:22:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:56,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202267577] [2020-10-27 14:22:56,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:56,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:22:56,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337692796] [2020-10-27 14:22:56,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:22:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:22:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:22:56,525 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 24 states. [2020-10-27 14:22:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:56,750 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-27 14:22:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:22:56,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-27 14:22:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:56,752 INFO L225 Difference]: With dead ends: 54 [2020-10-27 14:22:56,752 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:22:56,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:22:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:22:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 14:22:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:22:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 14:22:56,771 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2020-10-27 14:22:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:56,772 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 14:22:56,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:22:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 14:22:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:22:56,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:56,773 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:56,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:22:56,775 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1790908936, now seen corresponding path program 21 times [2020-10-27 14:22:56,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:56,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672555657] [2020-10-27 14:22:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:57,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:57,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:22:57,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-27 14:22:57,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:22:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:22:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:57,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:57,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:57,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:57,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:57,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:22:57,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:57,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:57,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:57,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672555657] [2020-10-27 14:22:57,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:57,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:22:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557170065] [2020-10-27 14:22:57,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:22:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:57,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:22:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:22:57,830 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 25 states. [2020-10-27 14:22:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:57,971 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-27 14:22:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:22:57,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-27 14:22:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:57,973 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:22:57,973 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:22:57,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:22:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:22:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 14:22:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:22:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 14:22:57,983 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-27 14:22:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 14:22:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:22:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 14:22:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:22:57,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:57,984 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:57,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:22:57,984 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -167888274, now seen corresponding path program 22 times [2020-10-27 14:22:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:57,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633911119] [2020-10-27 14:22:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:58,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:58,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:22:58,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:58,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-27 14:22:58,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:22:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:22:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:59,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:59,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:59,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:59,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:59,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:59,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:22:59,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:22:59,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633911119] [2020-10-27 14:22:59,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:59,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:22:59,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363044796] [2020-10-27 14:22:59,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:22:59,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:59,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:22:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:22:59,114 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 26 states. [2020-10-27 14:22:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:59,279 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-27 14:22:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:22:59,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-27 14:22:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:59,280 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:22:59,280 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:22:59,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:22:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:22:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 14:22:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:22:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 14:22:59,288 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2020-10-27 14:22:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:59,288 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 14:22:59,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:22:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 14:22:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:22:59,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:59,289 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:59,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:22:59,289 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1393855304, now seen corresponding path program 23 times [2020-10-27 14:22:59,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:59,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022176397] [2020-10-27 14:22:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:59,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:59,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:59,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:22:59,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:59,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 14:22:59,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:22:59,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:22:59,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:22:59,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:00,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:00,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:00,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:00,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:23:00,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:00,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022176397] [2020-10-27 14:23:00,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:00,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:23:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142567215] [2020-10-27 14:23:00,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:23:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:23:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:23:00,455 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 27 states. [2020-10-27 14:23:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:00,643 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-27 14:23:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:23:00,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-27 14:23:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:00,645 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:23:00,645 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:23:00,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:23:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:23:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 14:23:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:23:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-27 14:23:00,650 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2020-10-27 14:23:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:00,650 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-27 14:23:00,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:23:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-27 14:23:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:23:00,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:00,651 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:00,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:23:00,651 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash -744127570, now seen corresponding path program 24 times [2020-10-27 14:23:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:00,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854189233] [2020-10-27 14:23:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:01,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:01,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:23:01,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:01,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-27 14:23:01,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:01,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:23:01,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:23:01,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:01,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:01,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:01,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:01,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:01,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:23:01,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:01,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:01,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:01,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:01,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854189233] [2020-10-27 14:23:01,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:01,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:23:01,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283808530] [2020-10-27 14:23:01,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:23:01,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:23:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:23:01,822 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 28 states. [2020-10-27 14:23:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:01,922 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-27 14:23:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:23:01,923 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-27 14:23:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:01,924 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:23:01,924 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:23:01,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:23:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:23:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 14:23:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:23:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 14:23:01,936 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2020-10-27 14:23:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:01,936 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 14:23:01,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:23:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 14:23:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:23:01,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:01,937 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:01,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:23:01,937 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2077404296, now seen corresponding path program 25 times [2020-10-27 14:23:01,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:01,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666002084] [2020-10-27 14:23:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:01,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:02,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:02,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:23:02,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:02,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 14:23:02,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:23:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:23:02,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:03,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:03,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:03,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:03,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:03,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:03,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:23:03,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:03,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:03,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:03,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:03,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666002084] [2020-10-27 14:23:03,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:03,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:23:03,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511345430] [2020-10-27 14:23:03,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:23:03,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:03,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:23:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:23:03,174 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 29 states. [2020-10-27 14:23:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:03,386 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-27 14:23:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:23:03,387 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-27 14:23:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:03,388 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:23:03,388 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:23:03,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:23:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:23:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 14:23:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:23:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 14:23:03,393 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-10-27 14:23:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:03,393 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 14:23:03,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:23:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 14:23:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:23:03,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:03,394 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:03,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:23:03,395 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -459309842, now seen corresponding path program 26 times [2020-10-27 14:23:03,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:03,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6560436] [2020-10-27 14:23:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:03,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:04,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:04,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:04,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:04,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:04,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:04,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:04,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:04,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:23:04,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:04,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:04,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:04,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:04,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:04,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6560436] [2020-10-27 14:23:04,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:04,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:23:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89107499] [2020-10-27 14:23:04,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:23:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:23:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:23:04,738 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 30 states. [2020-10-27 14:23:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:04,944 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-27 14:23:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:23:04,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-27 14:23:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:04,946 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:23:04,946 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 14:23:04,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:23:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 14:23:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 14:23:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:23:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 14:23:04,953 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-27 14:23:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:04,954 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 14:23:04,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:23:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 14:23:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:23:04,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:04,955 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:04,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:23:04,962 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1837989320, now seen corresponding path program 27 times [2020-10-27 14:23:04,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:04,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76226755] [2020-10-27 14:23:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:04,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:05,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:05,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:23:05,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:05,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-27 14:23:05,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:23:05,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:05,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:23:05,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:06,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:06,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:06,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:06,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:06,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:06,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:23:06,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:06,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:06,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:06,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:06,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:23:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:06,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76226755] [2020-10-27 14:23:06,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:06,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:23:06,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404485100] [2020-10-27 14:23:06,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:23:06,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:23:06,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:23:06,448 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 31 states. [2020-10-27 14:23:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:06,584 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-27 14:23:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:23:06,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-27 14:23:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:06,585 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:23:06,585 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:23:06,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:23:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:23:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 14:23:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:23:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-27 14:23:06,591 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2020-10-27 14:23:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:06,591 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-27 14:23:06,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:23:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-27 14:23:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:23:06,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:06,592 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:06,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:23:06,593 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1627380178, now seen corresponding path program 28 times [2020-10-27 14:23:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:06,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120157432] [2020-10-27 14:23:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:06,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:23:07,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:08,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:08,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:08,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:08,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:08,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:08,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:08,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:08,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:08,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:08,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:08,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120157432] [2020-10-27 14:23:08,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:08,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:23:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110457660] [2020-10-27 14:23:08,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:23:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:23:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:23:08,043 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 32 states. [2020-10-27 14:23:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:08,274 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-27 14:23:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:23:08,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-27 14:23:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:08,276 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:23:08,276 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 14:23:08,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:23:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 14:23:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 14:23:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:23:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 14:23:08,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2020-10-27 14:23:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:08,281 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 14:23:08,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:23:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 14:23:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:23:08,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:08,282 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:08,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:23:08,283 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash 606535928, now seen corresponding path program 29 times [2020-10-27 14:23:08,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:08,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349273243] [2020-10-27 14:23:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:08,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:09,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:09,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:23:09,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:09,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-27 14:23:09,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:09,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:23:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:23:09,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:09,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:09,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:09,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:09,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:23:09,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:09,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:09,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349273243] [2020-10-27 14:23:09,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:09,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:23:09,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061037343] [2020-10-27 14:23:09,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:23:09,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:09,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:23:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:23:09,837 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 33 states. [2020-10-27 14:23:10,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:10,025 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 14:23:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:23:10,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-27 14:23:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:10,026 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:23:10,027 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:23:10,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:23:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:23:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 14:23:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:23:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-27 14:23:10,032 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2020-10-27 14:23:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:10,033 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-27 14:23:10,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:23:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-27 14:23:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:23:10,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:10,033 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:10,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:23:10,034 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1138458478, now seen corresponding path program 30 times [2020-10-27 14:23:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:10,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298959199] [2020-10-27 14:23:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:10,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:10,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:10,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:23:10,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:10,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-27 14:23:10,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:10,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:23:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:23:10,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:11,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:11,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:11,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:11,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:11,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:11,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:23:11,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:11,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:11,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298959199] [2020-10-27 14:23:11,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:11,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:23:11,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967649524] [2020-10-27 14:23:11,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:23:11,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:11,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:23:11,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:23:11,763 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 34 states. [2020-10-27 14:23:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:12,057 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-27 14:23:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:23:12,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-27 14:23:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:12,058 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:23:12,058 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:23:12,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:23:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:23:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 14:23:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:23:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 14:23:12,065 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2020-10-27 14:23:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:12,066 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 14:23:12,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:23:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 14:23:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:23:12,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:12,066 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:12,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:23:12,068 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash 448188344, now seen corresponding path program 31 times [2020-10-27 14:23:12,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:12,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897255926] [2020-10-27 14:23:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:12,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:12,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:23:12,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:13,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:13,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:13,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:13,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:13,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:13,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:13,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:13,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897255926] [2020-10-27 14:23:13,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:13,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:23:13,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460111816] [2020-10-27 14:23:13,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:23:13,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:23:13,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:23:13,784 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 35 states. [2020-10-27 14:23:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:14,052 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 14:23:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:23:14,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-27 14:23:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:14,054 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:23:14,054 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:23:14,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:23:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:23:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 14:23:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:23:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-27 14:23:14,059 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-27 14:23:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:14,059 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-27 14:23:14,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:23:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-27 14:23:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:23:14,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:14,060 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:14,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:23:14,060 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash 524650670, now seen corresponding path program 32 times [2020-10-27 14:23:14,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:14,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550419910] [2020-10-27 14:23:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:14,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:23:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:15,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:15,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:15,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:15,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:15,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:15,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:15,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550419910] [2020-10-27 14:23:15,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:15,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:23:15,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126596942] [2020-10-27 14:23:15,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:23:15,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:23:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:23:15,708 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 36 states. [2020-10-27 14:23:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:16,004 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-27 14:23:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:23:16,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-27 14:23:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:16,005 INFO L225 Difference]: With dead ends: 66 [2020-10-27 14:23:16,005 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:23:16,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:23:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:23:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 14:23:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:23:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 14:23:16,010 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2020-10-27 14:23:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:16,010 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 14:23:16,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:23:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 14:23:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:23:16,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:16,012 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:16,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:23:16,013 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1399984520, now seen corresponding path program 33 times [2020-10-27 14:23:16,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:16,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484439747] [2020-10-27 14:23:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:16,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:16,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:16,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:23:16,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:17,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:17,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:17,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484439747] [2020-10-27 14:23:17,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:17,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:23:17,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209095980] [2020-10-27 14:23:17,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:23:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:23:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:23:17,698 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 37 states. [2020-10-27 14:23:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:17,957 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-27 14:23:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:23:17,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2020-10-27 14:23:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:17,959 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:23:17,959 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:23:17,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:23:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:23:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 14:23:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:23:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-27 14:23:17,967 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2020-10-27 14:23:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:17,967 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-27 14:23:17,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:23:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-27 14:23:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:23:17,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:17,968 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:17,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:23:17,968 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash -934133266, now seen corresponding path program 34 times [2020-10-27 14:23:17,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:17,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84174105] [2020-10-27 14:23:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:17,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:18,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:18,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:23:18,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:18,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-27 14:23:18,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:23:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:23:18,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:19,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:19,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:19,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84174105] [2020-10-27 14:23:19,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:19,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:23:19,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675359472] [2020-10-27 14:23:19,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:23:19,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:23:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:23:19,719 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 38 states. [2020-10-27 14:23:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:19,970 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-27 14:23:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:23:19,971 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-27 14:23:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:19,972 INFO L225 Difference]: With dead ends: 68 [2020-10-27 14:23:19,972 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:23:19,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:23:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:23:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 14:23:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:23:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-27 14:23:19,977 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2020-10-27 14:23:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-27 14:23:19,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:23:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-27 14:23:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:23:19,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:19,978 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:19,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:23:19,978 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash 622353720, now seen corresponding path program 35 times [2020-10-27 14:23:19,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:19,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650404052] [2020-10-27 14:23:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:20,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:20,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:20,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:23:20,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:20,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-27 14:23:20,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:20,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:23:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:23:20,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:21,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:21,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:21,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:21,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:21,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:21,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:21,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650404052] [2020-10-27 14:23:21,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:21,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:23:21,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108963855] [2020-10-27 14:23:21,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:23:21,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:21,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:23:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:23:21,708 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 39 states. [2020-10-27 14:23:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:21,984 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-27 14:23:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:23:21,984 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-10-27 14:23:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:21,985 INFO L225 Difference]: With dead ends: 69 [2020-10-27 14:23:21,985 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:23:21,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:23:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:23:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 14:23:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:23:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-27 14:23:21,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-10-27 14:23:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:21,992 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-27 14:23:21,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:23:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-27 14:23:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:23:21,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:21,993 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:21,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:23:21,993 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1628810030, now seen corresponding path program 36 times [2020-10-27 14:23:21,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:21,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76260160] [2020-10-27 14:23:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:22,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:22,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:22,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:23:22,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:22,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-27 14:23:22,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:22,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:23:22,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:22,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:23:22,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:23,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:23,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:23,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:23,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:23,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:23,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:23,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76260160] [2020-10-27 14:23:23,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:23,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:23:23,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836236683] [2020-10-27 14:23:23,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:23:23,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:23:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:23:23,868 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 40 states. [2020-10-27 14:23:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:24,177 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-27 14:23:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:23:24,178 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-27 14:23:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:24,179 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:23:24,179 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:23:24,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:23:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:23:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 14:23:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:23:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 14:23:24,195 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-27 14:23:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:24,195 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 14:23:24,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:23:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 14:23:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:23:24,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:24,196 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:24,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:23:24,196 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1530782728, now seen corresponding path program 37 times [2020-10-27 14:23:24,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:24,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174958495] [2020-10-27 14:23:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:25,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:25,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:23:25,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:25,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-27 14:23:25,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:23:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:23:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:26,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:26,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:26,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174958495] [2020-10-27 14:23:26,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:26,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:23:26,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692532756] [2020-10-27 14:23:26,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:23:26,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:23:26,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:23:26,536 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2020-10-27 14:23:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:26,852 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-27 14:23:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:23:26,853 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-27 14:23:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:26,854 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:23:26,854 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:23:26,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:23:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:23:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:23:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:23:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-27 14:23:26,860 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-10-27 14:23:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:26,860 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-27 14:23:26,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:23:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-27 14:23:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:23:26,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:26,861 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:26,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:23:26,861 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash -693910418, now seen corresponding path program 38 times [2020-10-27 14:23:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:26,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351192748] [2020-10-27 14:23:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:26,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:27,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:27,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:23:27,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:27,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-27 14:23:27,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:23:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:23:27,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:29,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:29,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:29,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:29,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:29,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351192748] [2020-10-27 14:23:29,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:29,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:23:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733404766] [2020-10-27 14:23:29,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:23:29,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:23:29,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:23:29,170 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 42 states. [2020-10-27 14:23:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:29,309 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-27 14:23:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:23:29,310 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-27 14:23:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:29,311 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:23:29,311 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:23:29,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:23:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:23:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 14:23:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:23:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-27 14:23:29,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2020-10-27 14:23:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:29,316 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-27 14:23:29,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:23:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-27 14:23:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:23:29,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:29,317 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:29,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:23:29,317 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -520672584, now seen corresponding path program 39 times [2020-10-27 14:23:29,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:29,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651571726] [2020-10-27 14:23:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:29,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:30,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:30,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:23:30,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:30,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-10-27 14:23:30,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:30,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:23:30,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:30,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:23:30,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:31,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:31,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:31,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:31,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:31,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:31,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:31,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:31,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:31,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:31,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:31,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651571726] [2020-10-27 14:23:31,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:31,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:23:31,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125042471] [2020-10-27 14:23:31,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:23:31,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:23:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:23:31,628 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 43 states. [2020-10-27 14:23:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:31,911 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 14:23:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:23:31,912 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 54 [2020-10-27 14:23:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:31,913 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:23:31,913 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:23:31,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:23:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:23:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 14:23:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:23:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-27 14:23:31,919 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2020-10-27 14:23:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:31,920 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-27 14:23:31,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:23:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-27 14:23:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:23:31,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:31,920 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:31,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:23:31,921 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash 554732974, now seen corresponding path program 40 times [2020-10-27 14:23:31,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:31,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950047248] [2020-10-27 14:23:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:32,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:32,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:23:32,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:32,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 14:23:32,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:23:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:23:32,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:34,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:34,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:34,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:34,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:34,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950047248] [2020-10-27 14:23:34,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:34,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:23:34,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679738121] [2020-10-27 14:23:34,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:23:34,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:23:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:23:34,088 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 44 states. [2020-10-27 14:23:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:34,423 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-27 14:23:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:23:34,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2020-10-27 14:23:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:34,424 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:23:34,424 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:23:34,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:23:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:23:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 14:23:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:23:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 14:23:34,430 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2020-10-27 14:23:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:34,430 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 14:23:34,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:23:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 14:23:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:23:34,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:34,431 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:34,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:23:34,432 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash -467433096, now seen corresponding path program 41 times [2020-10-27 14:23:34,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:34,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885708267] [2020-10-27 14:23:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:35,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:35,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:23:35,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:35,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-27 14:23:35,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:35,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 14:23:35,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:35,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:23:35,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:36,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:36,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:36,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:36,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:36,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:36,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:36,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:36,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885708267] [2020-10-27 14:23:36,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:36,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 14:23:36,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846705923] [2020-10-27 14:23:36,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 14:23:36,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 14:23:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:23:36,703 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 45 states. [2020-10-27 14:23:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:36,982 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-27 14:23:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 14:23:36,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 56 [2020-10-27 14:23:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:36,984 INFO L225 Difference]: With dead ends: 75 [2020-10-27 14:23:36,984 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:23:36,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:23:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:23:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 14:23:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:23:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-27 14:23:36,990 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-27 14:23:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:36,991 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-27 14:23:36,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 14:23:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-27 14:23:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:23:36,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:36,991 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:36,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:23:36,992 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2089810194, now seen corresponding path program 42 times [2020-10-27 14:23:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:36,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255823712] [2020-10-27 14:23:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:37,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:38,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:23:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:39,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:39,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:39,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:39,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:39,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:39,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:39,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:39,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:39,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:39,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255823712] [2020-10-27 14:23:39,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:39,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 14:23:39,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406653284] [2020-10-27 14:23:39,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 14:23:39,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 14:23:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:23:39,482 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 46 states. [2020-10-27 14:23:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:39,635 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-27 14:23:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 14:23:39,636 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2020-10-27 14:23:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:39,637 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:23:39,637 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:23:39,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:23:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:23:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 14:23:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:23:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 14:23:39,644 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2020-10-27 14:23:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:39,644 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 14:23:39,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 14:23:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 14:23:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:23:39,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:39,645 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:39,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 14:23:39,645 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash -843892680, now seen corresponding path program 43 times [2020-10-27 14:23:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:39,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567033805] [2020-10-27 14:23:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:39,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:40,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:40,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:23:40,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-27 14:23:40,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 14:23:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:23:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:42,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:42,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:42,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:42,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567033805] [2020-10-27 14:23:42,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:42,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 14:23:42,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510172240] [2020-10-27 14:23:42,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 14:23:42,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 14:23:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:23:42,254 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2020-10-27 14:23:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:42,617 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-27 14:23:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:23:42,617 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-10-27 14:23:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:42,619 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:23:42,619 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:23:42,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:23:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:23:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-27 14:23:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:23:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-27 14:23:42,624 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2020-10-27 14:23:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:42,624 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-27 14:23:42,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 14:23:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-27 14:23:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:23:42,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:42,625 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:42,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 14:23:42,625 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash -875155410, now seen corresponding path program 44 times [2020-10-27 14:23:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:42,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093079550] [2020-10-27 14:23:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:42,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 14:23:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:43,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:23:43,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:45,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:45,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:45,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:45,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:45,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:45,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:45,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:45,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093079550] [2020-10-27 14:23:45,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:45,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 14:23:45,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512589405] [2020-10-27 14:23:45,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 14:23:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 14:23:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:23:45,037 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 48 states. [2020-10-27 14:23:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:45,356 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 14:23:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 14:23:45,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 59 [2020-10-27 14:23:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:45,358 INFO L225 Difference]: With dead ends: 78 [2020-10-27 14:23:45,358 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:23:45,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:23:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:23:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 14:23:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:23:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 14:23:45,362 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2020-10-27 14:23:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:45,362 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 14:23:45,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 14:23:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 14:23:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:23:45,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:45,363 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:45,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 14:23:45,364 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:45,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1844300040, now seen corresponding path program 45 times [2020-10-27 14:23:45,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:45,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087091892] [2020-10-27 14:23:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:45,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:46,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:46,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:23:46,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:48,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:48,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087091892] [2020-10-27 14:23:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:48,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 14:23:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116723963] [2020-10-27 14:23:48,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 14:23:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 14:23:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:23:48,039 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 49 states. [2020-10-27 14:23:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:48,301 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 14:23:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:23:48,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-27 14:23:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:48,303 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:23:48,303 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:23:48,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:23:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:23:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 14:23:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:23:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-27 14:23:48,308 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2020-10-27 14:23:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:48,309 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-27 14:23:48,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 14:23:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-27 14:23:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:23:48,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:48,309 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:48,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 14:23:48,310 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1823012498, now seen corresponding path program 46 times [2020-10-27 14:23:48,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:48,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000297176] [2020-10-27 14:23:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:48,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:23:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:51,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:51,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:51,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:51,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:51,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:51,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:51,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:51,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000297176] [2020-10-27 14:23:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 14:23:51,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032408870] [2020-10-27 14:23:51,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 14:23:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 14:23:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:23:51,057 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 50 states. [2020-10-27 14:23:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:51,286 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-27 14:23:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:23:51,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 61 [2020-10-27 14:23:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:51,288 INFO L225 Difference]: With dead ends: 80 [2020-10-27 14:23:51,288 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:23:51,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:23:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:23:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 14:23:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:23:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 14:23:51,295 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-27 14:23:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:51,295 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 14:23:51,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 14:23:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 14:23:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:23:51,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:51,296 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:51,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 14:23:51,296 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1163098696, now seen corresponding path program 47 times [2020-10-27 14:23:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:51,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271488315] [2020-10-27 14:23:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:51,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:23:52,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:54,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:54,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:54,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:54,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:54,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:54,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:54,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:54,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271488315] [2020-10-27 14:23:54,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:54,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 14:23:54,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740542175] [2020-10-27 14:23:54,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 14:23:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 14:23:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:23:54,199 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 51 states. [2020-10-27 14:23:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:54,559 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-27 14:23:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 14:23:54,560 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 62 [2020-10-27 14:23:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:54,561 INFO L225 Difference]: With dead ends: 81 [2020-10-27 14:23:54,561 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 14:23:54,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:23:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 14:23:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 14:23:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:23:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-27 14:23:54,569 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2020-10-27 14:23:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:54,569 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-27 14:23:54,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 14:23:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-27 14:23:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:23:54,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:54,570 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:54,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 14:23:54,571 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2114359982, now seen corresponding path program 48 times [2020-10-27 14:23:54,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:54,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639585704] [2020-10-27 14:23:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:55,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:23:55,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:57,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:57,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:57,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:57,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:23:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639585704] [2020-10-27 14:23:57,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:57,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 14:23:57,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999928776] [2020-10-27 14:23:57,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 14:23:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 14:23:57,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 14:23:57,560 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 52 states. [2020-10-27 14:23:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:57,817 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-27 14:23:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 14:23:57,818 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2020-10-27 14:23:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:57,819 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:23:57,819 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 14:23:57,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 14:23:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 14:23:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 14:23:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:23:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 14:23:57,824 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2020-10-27 14:23:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:57,824 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 14:23:57,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 14:23:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 14:23:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:23:57,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:57,825 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:23:57,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 14:23:57,825 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 636363896, now seen corresponding path program 49 times [2020-10-27 14:23:57,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:57,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471662844] [2020-10-27 14:23:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:57,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:59,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:59,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:23:59,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:59,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-27 14:23:59,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 14:23:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:23:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:23:59,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:01,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:01,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:01,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:01,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471662844] [2020-10-27 14:24:01,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:01,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 14:24:01,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069686287] [2020-10-27 14:24:01,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 14:24:01,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 14:24:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:24:01,121 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 53 states. [2020-10-27 14:24:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:01,511 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-27 14:24:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:24:01,512 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 64 [2020-10-27 14:24:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:01,513 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:24:01,513 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:24:01,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:24:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:24:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-27 14:24:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:24:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-27 14:24:01,519 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2020-10-27 14:24:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:01,520 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-27 14:24:01,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 14:24:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-27 14:24:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:24:01,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:01,521 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:01,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 14:24:01,521 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2063125486, now seen corresponding path program 50 times [2020-10-27 14:24:01,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:01,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017977664] [2020-10-27 14:24:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:01,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:02,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:02,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:24:02,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:02,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-27 14:24:02,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:02,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 14:24:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:24:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:04,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:04,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:04,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:04,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017977664] [2020-10-27 14:24:04,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:04,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 14:24:04,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217570456] [2020-10-27 14:24:04,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 14:24:04,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 14:24:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:24:04,723 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 54 states. [2020-10-27 14:24:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:05,144 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-27 14:24:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 14:24:05,144 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 65 [2020-10-27 14:24:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:05,146 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:24:05,146 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:24:05,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:24:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:24:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 14:24:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:24:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 14:24:05,151 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2020-10-27 14:24:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:05,152 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 14:24:05,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 14:24:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 14:24:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:24:05,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:05,153 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:05,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 14:24:05,153 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:05,153 INFO L82 PathProgramCache]: Analyzing trace with hash -951905480, now seen corresponding path program 51 times [2020-10-27 14:24:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:05,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809061197] [2020-10-27 14:24:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:05,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:06,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:06,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:24:06,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:06,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1230 [2020-10-27 14:24:06,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:06,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 14:24:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:24:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:08,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:08,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:08,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:08,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809061197] [2020-10-27 14:24:08,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:08,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 14:24:08,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773972839] [2020-10-27 14:24:08,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 14:24:08,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 14:24:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 14:24:08,560 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 55 states. [2020-10-27 14:24:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:08,715 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-27 14:24:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 14:24:08,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 66 [2020-10-27 14:24:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:08,717 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:24:08,717 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:24:08,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 14:24:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:24:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 14:24:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:24:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-27 14:24:08,723 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-27 14:24:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:08,724 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-27 14:24:08,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 14:24:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-27 14:24:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:24:08,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:08,725 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:08,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 14:24:08,725 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash 71415086, now seen corresponding path program 52 times [2020-10-27 14:24:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454667603] [2020-10-27 14:24:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:08,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:24:10,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:12,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:12,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:12,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:12,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:12,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:12,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454667603] [2020-10-27 14:24:12,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:12,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 14:24:12,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137282856] [2020-10-27 14:24:12,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 14:24:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 14:24:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:24:12,236 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 56 states. [2020-10-27 14:24:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:12,636 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-27 14:24:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:24:12,636 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 67 [2020-10-27 14:24:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:12,637 INFO L225 Difference]: With dead ends: 86 [2020-10-27 14:24:12,637 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:24:12,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:24:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:24:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 14:24:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:24:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 14:24:12,647 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 67 [2020-10-27 14:24:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:12,647 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 14:24:12,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 14:24:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 14:24:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:24:12,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:12,648 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:12,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 14:24:12,648 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1729581560, now seen corresponding path program 53 times [2020-10-27 14:24:12,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:12,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97442616] [2020-10-27 14:24:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:14,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:14,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:24:14,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:16,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:16,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:16,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:16,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:16,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:16,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:16,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:16,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:16,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:16,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:16,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:16,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97442616] [2020-10-27 14:24:16,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:16,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 14:24:16,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69906853] [2020-10-27 14:24:16,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 14:24:16,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:16,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 14:24:16,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:24:16,367 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 57 states. [2020-10-27 14:24:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:16,791 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-27 14:24:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 14:24:16,792 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 68 [2020-10-27 14:24:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:16,793 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:24:16,793 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 14:24:16,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:24:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 14:24:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 14:24:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:24:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-27 14:24:16,798 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2020-10-27 14:24:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:16,798 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-27 14:24:16,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 14:24:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-27 14:24:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:24:16,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:16,799 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:16,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 14:24:16,800 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1593134702, now seen corresponding path program 54 times [2020-10-27 14:24:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127025365] [2020-10-27 14:24:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:16,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:18,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1352 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:24:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:20,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:20,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:20,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:20,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:20,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:20,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:20,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127025365] [2020-10-27 14:24:20,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:20,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 14:24:20,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881331324] [2020-10-27 14:24:20,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 14:24:20,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:20,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 14:24:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:24:20,618 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 58 states. [2020-10-27 14:24:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:20,936 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-27 14:24:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 14:24:20,937 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 69 [2020-10-27 14:24:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:20,938 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:24:20,938 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:24:20,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:24:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:24:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 14:24:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:24:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-27 14:24:20,942 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2020-10-27 14:24:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:20,942 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-27 14:24:20,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 14:24:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-27 14:24:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:24:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:20,944 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:20,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 14:24:20,944 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1658249400, now seen corresponding path program 55 times [2020-10-27 14:24:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:20,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733611041] [2020-10-27 14:24:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:20,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:22,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:22,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:24:22,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:24,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:24,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:24,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733611041] [2020-10-27 14:24:24,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:24,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 14:24:24,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702502904] [2020-10-27 14:24:24,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 14:24:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 14:24:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 14:24:24,769 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 59 states. [2020-10-27 14:24:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:24,942 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-27 14:24:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 14:24:24,943 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 70 [2020-10-27 14:24:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:24,944 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:24:24,944 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:24:24,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 14:24:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:24:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 14:24:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:24:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-27 14:24:24,948 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2020-10-27 14:24:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:24,949 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-27 14:24:24,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 14:24:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-27 14:24:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:24:24,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:24,950 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:24,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 14:24:24,950 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash -618162258, now seen corresponding path program 56 times [2020-10-27 14:24:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:24,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759837089] [2020-10-27 14:24:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:25,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:26,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:26,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:24:26,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:26,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-27 14:24:26,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 14:24:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:24:26,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:28,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:28,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:28,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:28,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:28,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759837089] [2020-10-27 14:24:28,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:28,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 14:24:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884551967] [2020-10-27 14:24:28,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 14:24:28,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 14:24:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 14:24:28,970 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 60 states. [2020-10-27 14:24:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:29,424 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-27 14:24:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 14:24:29,425 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 71 [2020-10-27 14:24:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:29,426 INFO L225 Difference]: With dead ends: 90 [2020-10-27 14:24:29,427 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 14:24:29,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 14:24:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 14:24:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-27 14:24:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:24:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 14:24:29,432 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-27 14:24:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:29,432 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 14:24:29,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 14:24:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 14:24:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:24:29,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:29,433 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:29,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 14:24:29,433 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1827520376, now seen corresponding path program 57 times [2020-10-27 14:24:29,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:29,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682535777] [2020-10-27 14:24:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:29,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 14:24:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:30,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:24:30,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:33,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:33,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:33,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:33,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682535777] [2020-10-27 14:24:33,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:33,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 14:24:33,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891752850] [2020-10-27 14:24:33,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 14:24:33,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 14:24:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:24:33,593 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 61 states. [2020-10-27 14:24:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:34,055 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-27 14:24:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 14:24:34,056 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 72 [2020-10-27 14:24:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:34,057 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:24:34,057 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:24:34,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:24:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:24:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-27 14:24:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:24:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-27 14:24:34,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2020-10-27 14:24:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:34,063 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-27 14:24:34,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 14:24:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-27 14:24:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:24:34,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:34,064 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:34,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 14:24:34,064 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:34,064 INFO L82 PathProgramCache]: Analyzing trace with hash 334270702, now seen corresponding path program 58 times [2020-10-27 14:24:34,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:34,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082031066] [2020-10-27 14:24:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:34,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1455 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:24:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:38,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:38,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:38,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:38,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:38,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:38,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:38,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:38,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:38,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:38,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:38,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:38,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082031066] [2020-10-27 14:24:38,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:38,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 14:24:38,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564471318] [2020-10-27 14:24:38,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 14:24:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 14:24:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 14:24:38,311 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 62 states. [2020-10-27 14:24:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:38,810 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-27 14:24:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 14:24:38,811 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 73 [2020-10-27 14:24:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:38,813 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:24:38,813 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 14:24:38,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 14:24:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 14:24:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 14:24:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:24:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-27 14:24:38,818 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2020-10-27 14:24:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:38,818 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-27 14:24:38,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 14:24:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-27 14:24:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 14:24:38,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:38,819 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:38,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 14:24:38,819 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1288171064, now seen corresponding path program 59 times [2020-10-27 14:24:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:38,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435213030] [2020-10-27 14:24:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:38,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:40,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:40,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:24:40,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:40,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-27 14:24:40,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 14:24:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 14:24:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:43,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:43,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:43,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:43,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435213030] [2020-10-27 14:24:43,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:43,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 14:24:43,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843291064] [2020-10-27 14:24:43,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 14:24:43,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 14:24:43,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:24:43,302 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 63 states. [2020-10-27 14:24:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:43,784 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-27 14:24:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 14:24:43,784 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 74 [2020-10-27 14:24:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:43,785 INFO L225 Difference]: With dead ends: 93 [2020-10-27 14:24:43,786 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 14:24:43,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:24:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 14:24:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-27 14:24:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:24:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-27 14:24:43,791 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2020-10-27 14:24:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:43,791 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-27 14:24:43,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 14:24:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-27 14:24:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:24:43,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:43,792 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:43,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 14:24:43,792 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash 794311214, now seen corresponding path program 60 times [2020-10-27 14:24:43,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:43,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210502858] [2020-10-27 14:24:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:45,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:45,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:24:45,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:45,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1591 [2020-10-27 14:24:45,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 14:24:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:24:45,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:48,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:48,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:48,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210502858] [2020-10-27 14:24:48,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:48,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 14:24:48,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490591696] [2020-10-27 14:24:48,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 14:24:48,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:48,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 14:24:48,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:24:48,336 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 64 states. [2020-10-27 14:24:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:48,831 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-27 14:24:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 14:24:48,832 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 75 [2020-10-27 14:24:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:48,833 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:24:48,833 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:24:48,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:24:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:24:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 14:24:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:24:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 14:24:48,838 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2020-10-27 14:24:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:48,838 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 14:24:48,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 14:24:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 14:24:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:24:48,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:48,839 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:48,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 14:24:48,840 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1630442248, now seen corresponding path program 61 times [2020-10-27 14:24:48,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:48,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447987565] [2020-10-27 14:24:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:50,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:50,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:24:50,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-27 14:24:50,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:50,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-27 14:24:50,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:50,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:24:50,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:53,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:53,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447987565] [2020-10-27 14:24:53,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:53,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-27 14:24:53,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398326192] [2020-10-27 14:24:53,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-27 14:24:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-27 14:24:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 14:24:53,583 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 65 states. [2020-10-27 14:24:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:54,081 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-27 14:24:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-27 14:24:54,082 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 76 [2020-10-27 14:24:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:54,083 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:24:54,083 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 14:24:54,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 14:24:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 14:24:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-27 14:24:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:24:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-27 14:24:54,089 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-27 14:24:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:54,089 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-27 14:24:54,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-27 14:24:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-27 14:24:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:24:54,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:54,090 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:54,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 14:24:54,090 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash 511611758, now seen corresponding path program 62 times [2020-10-27 14:24:54,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:54,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153299996] [2020-10-27 14:24:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:55,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:55,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:24:55,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-27 14:24:55,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-27 14:24:55,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:24:55,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:24:55,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:58,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:24:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:24:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:24:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:24:58,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153299996] [2020-10-27 14:24:58,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:24:58,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-27 14:24:58,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358142790] [2020-10-27 14:24:58,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-27 14:24:58,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:24:58,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-27 14:24:58,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:24:58,958 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 66 states. [2020-10-27 14:24:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:24:59,481 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-27 14:24:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-27 14:24:59,482 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 77 [2020-10-27 14:24:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:24:59,484 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:24:59,484 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:24:59,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:24:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:24:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 14:24:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:24:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-27 14:24:59,489 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2020-10-27 14:24:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:24:59,490 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-27 14:24:59,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-27 14:24:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-27 14:24:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:24:59,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:24:59,490 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:24:59,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 14:24:59,491 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:24:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:24:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1804190792, now seen corresponding path program 63 times [2020-10-27 14:24:59,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:24:59,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025951955] [2020-10-27 14:24:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:24:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:24:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1795 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:25:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:04,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:04,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:04,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:04,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025951955] [2020-10-27 14:25:04,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:04,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-27 14:25:04,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757311052] [2020-10-27 14:25:04,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-27 14:25:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-27 14:25:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 14:25:04,599 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 67 states. [2020-10-27 14:25:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:05,142 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-27 14:25:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 14:25:05,143 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 78 [2020-10-27 14:25:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:05,144 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:25:05,144 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:25:05,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 14:25:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:25:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-27 14:25:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:25:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-27 14:25:05,150 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2020-10-27 14:25:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:05,150 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-27 14:25:05,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-27 14:25:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-27 14:25:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:25:05,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:05,151 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:05,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 14:25:05,151 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash -579625810, now seen corresponding path program 64 times [2020-10-27 14:25:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:05,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127245293] [2020-10-27 14:25:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:05,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:07,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1850 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:25:07,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:10,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:10,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:10,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127245293] [2020-10-27 14:25:10,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:10,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-27 14:25:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331823691] [2020-10-27 14:25:10,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-27 14:25:10,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-27 14:25:10,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 14:25:10,427 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 68 states. [2020-10-27 14:25:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:10,678 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-27 14:25:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-27 14:25:10,679 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 79 [2020-10-27 14:25:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:10,681 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:25:10,681 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:25:10,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 14:25:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:25:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 14:25:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:25:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 14:25:10,686 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2020-10-27 14:25:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:10,686 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 14:25:10,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-27 14:25:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 14:25:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:25:10,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:10,687 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:10,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 14:25:10,687 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:10,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:10,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1272817032, now seen corresponding path program 65 times [2020-10-27 14:25:10,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:10,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875434759] [2020-10-27 14:25:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-27 14:25:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:12,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 14:25:12,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:16,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:16,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875434759] [2020-10-27 14:25:16,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:16,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-27 14:25:16,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844259886] [2020-10-27 14:25:16,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-27 14:25:16,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:16,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-27 14:25:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 14:25:16,319 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 69 states. [2020-10-27 14:25:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:16,733 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-27 14:25:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-27 14:25:16,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 80 [2020-10-27 14:25:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:16,735 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:25:16,735 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:25:16,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 14:25:16,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:25:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-27 14:25:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:25:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-27 14:25:16,740 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2020-10-27 14:25:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:16,740 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-27 14:25:16,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-27 14:25:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-27 14:25:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:25:16,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:16,741 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:16,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 14:25:16,741 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1286908434, now seen corresponding path program 66 times [2020-10-27 14:25:16,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:16,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013310825] [2020-10-27 14:25:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:16,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:19,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:19,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:25:19,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:19,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2551 [2020-10-27 14:25:19,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:19,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-27 14:25:19,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:19,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:25:19,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:22,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:22,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:22,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013310825] [2020-10-27 14:25:22,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:22,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-27 14:25:22,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395612352] [2020-10-27 14:25:22,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-27 14:25:22,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:22,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-27 14:25:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 14:25:22,877 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 70 states. [2020-10-27 14:25:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:23,444 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-27 14:25:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-27 14:25:23,444 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 81 [2020-10-27 14:25:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:23,446 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:25:23,446 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:25:23,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 14:25:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:25:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-27 14:25:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:25:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 14:25:23,452 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-27 14:25:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:23,452 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 14:25:23,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-27 14:25:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 14:25:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 14:25:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:23,453 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:23,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 14:25:23,453 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1723741896, now seen corresponding path program 67 times [2020-10-27 14:25:23,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:23,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588838467] [2020-10-27 14:25:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:25,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:25,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:25:25,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-27 14:25:25,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-27 14:25:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:25:25,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:29,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:29,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:29,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:29,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:25:29,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:29,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:29,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588838467] [2020-10-27 14:25:29,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:29,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-27 14:25:29,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988338780] [2020-10-27 14:25:29,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-27 14:25:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-27 14:25:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 14:25:29,158 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 71 states. [2020-10-27 14:25:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:29,719 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-27 14:25:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-27 14:25:29,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 82 [2020-10-27 14:25:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:29,721 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:25:29,721 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:25:29,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 14:25:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:25:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 14:25:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:25:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-27 14:25:29,725 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 82 [2020-10-27 14:25:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:29,726 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-27 14:25:29,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-27 14:25:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-27 14:25:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:25:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:29,726 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:29,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 14:25:29,726 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1914289966, now seen corresponding path program 68 times [2020-10-27 14:25:29,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:29,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88637057] [2020-10-27 14:25:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:29,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2089 [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:31,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 14:25:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:35,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:35,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:35,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:35,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88637057] [2020-10-27 14:25:35,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:35,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-27 14:25:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113185800] [2020-10-27 14:25:35,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-27 14:25:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-27 14:25:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 14:25:35,626 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 72 states. [2020-10-27 14:25:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:35,926 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-27 14:25:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-27 14:25:35,927 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 83 [2020-10-27 14:25:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:35,928 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:25:35,928 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:25:35,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 14:25:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:25:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-27 14:25:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:25:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 14:25:35,933 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2020-10-27 14:25:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:35,933 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 14:25:35,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-27 14:25:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 14:25:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:25:35,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:35,934 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:35,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 14:25:35,934 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1270839304, now seen corresponding path program 69 times [2020-10-27 14:25:35,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:35,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631211139] [2020-10-27 14:25:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:35,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:38,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:38,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 14:25:38,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2154 [2020-10-27 14:25:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-27 14:25:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:25:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:42,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:42,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:42,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:42,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:42,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:25:42,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:42,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:42,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:42,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631211139] [2020-10-27 14:25:42,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:42,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-27 14:25:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756015337] [2020-10-27 14:25:42,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-27 14:25:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-27 14:25:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 14:25:42,073 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 73 states. [2020-10-27 14:25:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:42,660 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-27 14:25:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-27 14:25:42,661 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 84 [2020-10-27 14:25:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:42,662 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:25:42,662 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:25:42,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 14:25:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:25:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 14:25:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:25:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-27 14:25:42,667 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2020-10-27 14:25:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:42,667 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-27 14:25:42,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-27 14:25:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-27 14:25:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:25:42,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:42,668 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:42,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 14:25:42,668 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1225598866, now seen corresponding path program 70 times [2020-10-27 14:25:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:42,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600191214] [2020-10-27 14:25:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:44,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:44,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:25:44,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:44,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2201 [2020-10-27 14:25:44,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-27 14:25:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:25:44,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:48,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:48,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:48,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600191214] [2020-10-27 14:25:48,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:48,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-27 14:25:48,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764079510] [2020-10-27 14:25:48,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-27 14:25:48,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-27 14:25:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 14:25:48,947 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 74 states. [2020-10-27 14:25:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:49,551 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-27 14:25:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-27 14:25:49,552 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 85 [2020-10-27 14:25:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:49,552 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:25:49,552 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:25:49,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 14:25:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:25:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 14:25:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:25:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-27 14:25:49,557 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2020-10-27 14:25:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:49,557 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-27 14:25:49,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-27 14:25:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-27 14:25:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 14:25:49,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:49,558 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:49,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 14:25:49,558 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 176854712, now seen corresponding path program 71 times [2020-10-27 14:25:49,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:49,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193249435] [2020-10-27 14:25:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2244 [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-27 14:25:51,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:51,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:25:51,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:56,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:25:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:56,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:56,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:56,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:25:56,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:56,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:25:56,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:25:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:25:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:25:56,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:25:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:25:56,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193249435] [2020-10-27 14:25:56,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:25:56,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-27 14:25:56,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616677711] [2020-10-27 14:25:56,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-27 14:25:56,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:25:56,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-27 14:25:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 14:25:56,027 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 75 states. [2020-10-27 14:25:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:25:56,495 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-27 14:25:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-27 14:25:56,496 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 86 [2020-10-27 14:25:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:25:56,497 INFO L225 Difference]: With dead ends: 105 [2020-10-27 14:25:56,497 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:25:56,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 14:25:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:25:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-27 14:25:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:25:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-27 14:25:56,503 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2020-10-27 14:25:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:25:56,503 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-27 14:25:56,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-27 14:25:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-27 14:25:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:25:56,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:25:56,504 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:25:56,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 14:25:56,504 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:25:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:25:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 703242670, now seen corresponding path program 72 times [2020-10-27 14:25:56,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:25:56,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092520181] [2020-10-27 14:25:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:25:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:25:56,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2315 [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-27 14:25:58,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:25:58,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:25:58,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:03,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092520181] [2020-10-27 14:26:03,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:03,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-27 14:26:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088222230] [2020-10-27 14:26:03,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-27 14:26:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-27 14:26:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 14:26:03,191 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 76 states. [2020-10-27 14:26:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:03,806 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-27 14:26:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-27 14:26:03,807 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 87 [2020-10-27 14:26:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:03,808 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:26:03,808 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:26:03,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 14:26:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:26:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-27 14:26:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:26:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 14:26:03,813 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2020-10-27 14:26:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:03,814 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 14:26:03,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-27 14:26:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 14:26:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 14:26:03,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:03,815 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:03,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 14:26:03,815 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash -158599816, now seen corresponding path program 73 times [2020-10-27 14:26:03,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:03,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196821494] [2020-10-27 14:26:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:03,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:06,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 14:26:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:10,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:10,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:10,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:10,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:10,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:10,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:26:10,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:10,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:10,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:10,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:10,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:10,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196821494] [2020-10-27 14:26:10,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:10,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-27 14:26:10,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422945626] [2020-10-27 14:26:10,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-27 14:26:10,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-27 14:26:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 14:26:10,948 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 77 states. [2020-10-27 14:26:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:11,376 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-10-27 14:26:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-27 14:26:11,376 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 88 [2020-10-27 14:26:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:11,378 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:26:11,378 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:26:11,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 14:26:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:26:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-27 14:26:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 14:26:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-27 14:26:11,382 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2020-10-27 14:26:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:11,382 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-27 14:26:11,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-27 14:26:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-27 14:26:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:26:11,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:11,383 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:11,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 14:26:11,383 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1105913106, now seen corresponding path program 74 times [2020-10-27 14:26:11,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:11,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510342672] [2020-10-27 14:26:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:11,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2545 [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-27 14:26:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:26:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:26:13,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:18,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:18,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:18,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:18,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:18,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:26:18,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:18,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:18,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510342672] [2020-10-27 14:26:18,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:18,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-27 14:26:18,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862047292] [2020-10-27 14:26:18,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-27 14:26:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-27 14:26:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-27 14:26:18,493 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 78 states. [2020-10-27 14:26:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:19,137 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-27 14:26:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-27 14:26:19,138 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 89 [2020-10-27 14:26:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:19,139 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:26:19,139 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 14:26:19,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-27 14:26:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 14:26:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 14:26:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:26:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 14:26:19,145 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2020-10-27 14:26:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:19,145 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 14:26:19,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-27 14:26:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 14:26:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:26:19,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:19,146 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:19,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 14:26:19,146 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash -407854024, now seen corresponding path program 75 times [2020-10-27 14:26:19,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:19,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958319796] [2020-10-27 14:26:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:21,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2479 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:26:21,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:26,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:26,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:26,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958319796] [2020-10-27 14:26:26,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:26,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-27 14:26:26,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530088792] [2020-10-27 14:26:26,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-27 14:26:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-27 14:26:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 14:26:26,318 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 79 states. [2020-10-27 14:26:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:26,918 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-27 14:26:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-27 14:26:26,919 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 90 [2020-10-27 14:26:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:26,921 INFO L225 Difference]: With dead ends: 109 [2020-10-27 14:26:26,921 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:26:26,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 14:26:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:26:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-27 14:26:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:26:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-27 14:26:26,926 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2020-10-27 14:26:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:26,926 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-27 14:26:26,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-27 14:26:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-27 14:26:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:26:26,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:26,927 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:26,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-27 14:26:26,927 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash -242858962, now seen corresponding path program 76 times [2020-10-27 14:26:26,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:26,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779877268] [2020-10-27 14:26:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:26,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking...