/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_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:26:14,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:26:14,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:26:14,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:26:14,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:26:14,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:26:14,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:26:14,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:26:14,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:26:14,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:26:14,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:26:14,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:26:14,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:26:14,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:26:14,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:26:14,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:26:14,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:26:14,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:26:14,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:26:14,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:26:14,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:26:14,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:26:14,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:26:14,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:26:14,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:26:14,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:26:14,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:26:14,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:26:14,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:26:14,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:26:14,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:26:14,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:26:14,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:26:14,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:26:14,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:26:14,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:26:14,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:26:14,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:26:14,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:26:14,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:26:14,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:26:14,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:26:14,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:26:14,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:26:14,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:26:14,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:26:14,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:26:14,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:26:14,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:26:14,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:26:14,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:26:14,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:26:14,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:26:14,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:26:14,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:26:14,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:26:14,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:26:14,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:26:14,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:26:14,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:26:14,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:26:14,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:26:14,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:26:14,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:14,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:26:14,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:26:14,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:26:14,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:26:14,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:26:14,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:26:14,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:26:14,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:26:15,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:26:15,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:26:15,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:26:15,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:26:15,327 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:26:15,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-27 14:26:15,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147543524/97684b4935b4490abaf224451003436f/FLAG5f4958905 [2020-10-27 14:26:16,051 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:26:16,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-27 14:26:16,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147543524/97684b4935b4490abaf224451003436f/FLAG5f4958905 [2020-10-27 14:26:16,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147543524/97684b4935b4490abaf224451003436f [2020-10-27 14:26:16,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:26:16,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:26:16,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:16,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:26:16,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:26:16,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26fda3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16, skipping insertion in model container [2020-10-27 14:26:16,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:26:16,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:26:16,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:16,613 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:26:16,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:16,654 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:26:16,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16 WrapperNode [2020-10-27 14:26:16,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:16,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:26:16,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:26:16,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:26:16,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... [2020-10-27 14:26:16,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:26:16,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:26:16,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:26:16,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:26:16,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:26:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:26:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:26:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:26:16,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:26:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:26:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:26:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:26:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:26:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:26:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:26:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:26:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:26:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:26:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:26:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:26:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:26:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:26:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:26:17,124 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:26:17,124 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 14:26:17,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:17 BoogieIcfgContainer [2020-10-27 14:26:17,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:26:17,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:26:17,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:26:17,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:26:17,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:26:16" (1/3) ... [2020-10-27 14:26:17,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4b501f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:17, skipping insertion in model container [2020-10-27 14:26:17,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:16" (2/3) ... [2020-10-27 14:26:17,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4b501f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:17, skipping insertion in model container [2020-10-27 14:26:17,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:17" (3/3) ... [2020-10-27 14:26:17,138 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2020-10-27 14:26:17,153 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:26:17,159 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:26:17,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:26:17,245 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:26:17,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:26:17,246 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:26:17,246 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:26:17,246 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:26:17,251 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:26:17,251 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:26:17,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:26:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-27 14:26:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:26:17,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:17,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:17,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash -18791634, now seen corresponding path program 1 times [2020-10-27 14:26:17,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:17,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829295548] [2020-10-27 14:26:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:17,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:17,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:17,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:18,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:18,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:26:18,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:26:18,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-27 14:26:18,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:26:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:26:18,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:26:18,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:26:18,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:18,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:18,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:18,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:26:18,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:18,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:18,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829295548] [2020-10-27 14:26:18,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:18,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:26:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369369768] [2020-10-27 14:26:18,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:26:18,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:26:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:18,477 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-27 14:26:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:18,626 INFO L93 Difference]: Finished difference Result 62 states and 92 transitions. [2020-10-27 14:26:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:26:18,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 14:26:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:18,637 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:26:18,637 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 14:26:18,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 14:26:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 14:26:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:26:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 14:26:18,687 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-27 14:26:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:18,688 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 14:26:18,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:26:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 14:26:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:26:18,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:18,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:18,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:26:18,690 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159768, now seen corresponding path program 1 times [2020-10-27 14:26:18,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:18,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853063290] [2020-10-27 14:26:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:18,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:18,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:19,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:22,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:26:22,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:26:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3383 [2020-10-27 14:26:22,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:26:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:26:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:26:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:22,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:22,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:22,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:22,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:22,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:26:22,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853063290] [2020-10-27 14:26:22,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:22,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:26:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290778693] [2020-10-27 14:26:22,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:26:22,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:26:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:26:22,240 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 9 states. [2020-10-27 14:26:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:22,529 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-27 14:26:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:26:22,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 14:26:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:22,531 INFO L225 Difference]: With dead ends: 42 [2020-10-27 14:26:22,531 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:26:22,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:26:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:26:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-27 14:26:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:26:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 14:26:22,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 25 [2020-10-27 14:26:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:22,544 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 14:26:22,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:26:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 14:26:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:26:22,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:22,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:22,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:26:22,546 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1831655742, now seen corresponding path program 1 times [2020-10-27 14:26:22,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:22,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175544296] [2020-10-27 14:26:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:22,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:25,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:25,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:26:25,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:25,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3164 [2020-10-27 14:26:25,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:26:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:26:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:26:25,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:25,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:25,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:25,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:25,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:25,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:25,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:25,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:25,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:25,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:26:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:26:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:25,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:25,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:25,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:25,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:25,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:26:25,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:25,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:26:25,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175544296] [2020-10-27 14:26:25,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:25,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:26:25,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132138983] [2020-10-27 14:26:25,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:26:25,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:25,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:26:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:25,803 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-10-27 14:26:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:25,927 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-27 14:26:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:26:25,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-27 14:26:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:25,930 INFO L225 Difference]: With dead ends: 68 [2020-10-27 14:26:25,931 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:26:25,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:26:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 14:26:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:26:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 14:26:25,941 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2020-10-27 14:26:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:25,941 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 14:26:25,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:26:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 14:26:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:26:25,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:25,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:25,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:26:25,943 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash 373741252, now seen corresponding path program 2 times [2020-10-27 14:26:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582083902] [2020-10-27 14:26:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:25,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:25,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:26,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:26,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:26,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:27,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:30,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:30,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:26:30,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:26:30,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:26:30,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:26:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:26:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:26:30,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:31,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:31,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:31,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:26:31,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:31,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:31,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:26:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:31,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:31,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:31,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:26:31,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:26:31,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582083902] [2020-10-27 14:26:31,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:31,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:26:31,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916375290] [2020-10-27 14:26:31,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:26:31,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:26:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:31,091 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-27 14:26:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:31,209 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-10-27 14:26:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:26:31,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-27 14:26:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:31,210 INFO L225 Difference]: With dead ends: 75 [2020-10-27 14:26:31,211 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:26:31,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:26:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 14:26:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:26:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-27 14:26:31,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2020-10-27 14:26:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:31,221 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-27 14:26:31,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:26:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-27 14:26:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:26:31,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:31,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:26:31,223 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 254678274, now seen corresponding path program 3 times [2020-10-27 14:26:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:31,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942147108] [2020-10-27 14:26:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:36,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:26:36,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:36,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 14:26:36,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:26:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:26:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:26:36,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:36,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:36,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:36,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:36,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:36,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:36,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 14:26:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:36,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:36,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:36,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:36,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:26:36,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:36,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:36,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:36,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:36,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 14:26:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942147108] [2020-10-27 14:26:36,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:36,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:26:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350725708] [2020-10-27 14:26:36,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:26:36,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:26:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:36,373 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 7 states. [2020-10-27 14:26:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:36,534 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-10-27 14:26:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:26:36,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-27 14:26:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:36,536 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:26:36,536 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:26:36,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:26:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 14:26:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:26:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-27 14:26:36,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2020-10-27 14:26:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:36,556 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-27 14:26:36,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:26:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-27 14:26:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:26:36,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:36,563 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:36,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:26:36,564 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash 677329924, now seen corresponding path program 4 times [2020-10-27 14:26:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067569136] [2020-10-27 14:26:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:41,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:41,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:26:41,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:41,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:26:41,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:41,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:26:41,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:26:41,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:26:41,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:41,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:41,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:41,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:41,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:41,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:41,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:41,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:41,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:41,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:41,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:26:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:41,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:41,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:41,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:26:41,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:41,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:41,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:41,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-27 14:26:41,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067569136] [2020-10-27 14:26:41,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:41,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:26:41,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563210095] [2020-10-27 14:26:41,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:26:41,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:26:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:26:41,720 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 8 states. [2020-10-27 14:26:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:41,850 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-27 14:26:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:26:41,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-27 14:26:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:41,852 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:26:41,852 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:26:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:26:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:26:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 14:26:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:26:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 14:26:41,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-27 14:26:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:41,862 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 14:26:41,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:26:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 14:26:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:26:41,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:41,864 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:41,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:26:41,864 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1064555330, now seen corresponding path program 5 times [2020-10-27 14:26:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:41,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574076852] [2020-10-27 14:26:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:41,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:41,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:42,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:42,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:46,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:46,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:26:46,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:46,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:26:46,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:46,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:26:46,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:26:46,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:26:46,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:46,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:46,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:46,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:46,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:46,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:46,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:46,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 14:26:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:46,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:46,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:46,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:46,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:46,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:26:46,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:46,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:46,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:46,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:46,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-27 14:26:46,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574076852] [2020-10-27 14:26:46,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:46,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:26:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491110208] [2020-10-27 14:26:46,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:26:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:26:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:26:47,000 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2020-10-27 14:26:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:47,152 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-27 14:26:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:26:47,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-27 14:26:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:47,154 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:26:47,154 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:26:47,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:26:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:26:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 14:26:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:26:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-27 14:26:47,163 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2020-10-27 14:26:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:47,166 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-27 14:26:47,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:26:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-27 14:26:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:26:47,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:47,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:47,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:26:47,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 583078212, now seen corresponding path program 6 times [2020-10-27 14:26:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:47,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905392867] [2020-10-27 14:26:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:47,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:47,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:49,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:52,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:26:52,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:26:52,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:26:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:26:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:26:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:52,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:52,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:52,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:52,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:52,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:52,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 14:26:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:52,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:52,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:52,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:52,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:26:52,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:52,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:52,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:52,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-27 14:26:52,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905392867] [2020-10-27 14:26:52,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:52,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:26:52,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772598352] [2020-10-27 14:26:52,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:26:52,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:26:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:26:52,352 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 10 states. [2020-10-27 14:26:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:52,505 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2020-10-27 14:26:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:26:52,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 14:26:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:52,506 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:26:52,506 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:26:52,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 14:26:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:26:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 14:26:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:26:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-27 14:26:52,524 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 53 [2020-10-27 14:26:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:52,524 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-27 14:26:52,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:26:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-27 14:26:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:26:52,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:52,528 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:52,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:26:52,529 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash -137600638, now seen corresponding path program 7 times [2020-10-27 14:26:52,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:52,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124715161] [2020-10-27 14:26:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:52,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:57,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:26:57,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:57,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:26:57,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:26:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:26:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:26:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:57,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:57,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:57,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:57,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:26:57,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:57,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:26:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:57,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:26:57,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:57,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:26:57,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:26:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-27 14:26:57,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124715161] [2020-10-27 14:26:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:26:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775877668] [2020-10-27 14:26:57,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:26:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:26:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:26:57,739 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2020-10-27 14:26:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:57,960 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-27 14:26:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:26:57,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 14:26:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:57,961 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:26:57,961 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:26:57,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:26:57,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:26:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-27 14:26:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:26:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-27 14:26:57,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2020-10-27 14:26:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:57,976 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-27 14:26:57,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:26:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-27 14:26:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:26:57,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:57,979 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:57,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:26:57,979 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash -911976828, now seen corresponding path program 8 times [2020-10-27 14:26:57,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:57,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470725100] [2020-10-27 14:26:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:58,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:58,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:59,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:03,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:27:03,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:03,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:27:03,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:27:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:27:03,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:03,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:03,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:03,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:03,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:03,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-27 14:27:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:03,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 14:27:03,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470725100] [2020-10-27 14:27:03,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:03,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:03,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419544554] [2020-10-27 14:27:03,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:03,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:03,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:03,167 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2020-10-27 14:27:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:03,402 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-10-27 14:27:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:27:03,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 14:27:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:03,404 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:27:03,404 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 14:27:03,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 14:27:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 14:27:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:27:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-27 14:27:03,414 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2020-10-27 14:27:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:03,414 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-27 14:27:03,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-27 14:27:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:27:03,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:03,416 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:03,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:03,416 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash -77611070, now seen corresponding path program 9 times [2020-10-27 14:27:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:03,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596877232] [2020-10-27 14:27:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:08,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:08,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:08,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:08,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:27:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:08,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-27 14:27:08,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596877232] [2020-10-27 14:27:08,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448909824] [2020-10-27 14:27:08,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:08,617 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-10-27 14:27:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:08,795 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2020-10-27 14:27:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:08,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-27 14:27:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:08,797 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:27:08,797 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:27:08,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:27:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 14:27:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:27:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-27 14:27:08,822 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2020-10-27 14:27:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:08,822 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-27 14:27:08,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-27 14:27:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:27:08,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:08,823 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:08,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:27:08,823 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1035924540, now seen corresponding path program 10 times [2020-10-27 14:27:08,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:08,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573522123] [2020-10-27 14:27:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:13,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:27:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:27:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:27:13,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:14,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:14,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:14,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:14,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:14,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:14,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:14,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:27:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:14,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-10-27 14:27:14,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573522123] [2020-10-27 14:27:14,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:14,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:27:14,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916605154] [2020-10-27 14:27:14,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:27:14,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:14,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:27:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:14,088 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 14 states. [2020-10-27 14:27:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:14,327 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2020-10-27 14:27:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:14,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-27 14:27:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:14,330 INFO L225 Difference]: With dead ends: 131 [2020-10-27 14:27:14,330 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:27:14,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:27:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 14:27:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:27:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-27 14:27:14,350 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2020-10-27 14:27:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:14,350 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-27 14:27:14,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:27:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-27 14:27:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:27:14,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:14,351 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:14,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:27:14,352 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2086006274, now seen corresponding path program 11 times [2020-10-27 14:27:14,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:14,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279157044] [2020-10-27 14:27:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:27:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:19,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:19,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:19,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:19,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:19,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:27:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:19,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:19,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:19,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-27 14:27:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279157044] [2020-10-27 14:27:19,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:19,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:19,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326858021] [2020-10-27 14:27:19,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:19,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:19,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:19,661 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 15 states. [2020-10-27 14:27:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:19,991 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-27 14:27:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:19,992 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-27 14:27:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:19,993 INFO L225 Difference]: With dead ends: 138 [2020-10-27 14:27:19,994 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 14:27:19,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 14:27:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-27 14:27:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:27:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-27 14:27:20,008 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2020-10-27 14:27:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:20,008 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-27 14:27:20,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-27 14:27:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:27:20,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:20,017 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:20,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:27:20,017 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:20,019 INFO L82 PathProgramCache]: Analyzing trace with hash 315568388, now seen corresponding path program 12 times [2020-10-27 14:27:20,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:20,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688945513] [2020-10-27 14:27:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:27:25,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:25,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:27:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:27:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:25,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:25,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:25,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:25,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:25,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:25,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-27 14:27:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:25,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:25,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:25,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-27 14:27:25,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688945513] [2020-10-27 14:27:25,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:25,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:27:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899886359] [2020-10-27 14:27:25,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:27:25,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:27:25,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:25,337 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 16 states. [2020-10-27 14:27:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:25,667 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2020-10-27 14:27:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:27:25,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-27 14:27:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:25,669 INFO L225 Difference]: With dead ends: 145 [2020-10-27 14:27:25,669 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:27:25,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 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 14:27:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:27:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-27 14:27:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:27:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-27 14:27:25,682 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2020-10-27 14:27:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:25,683 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-27 14:27:25,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:27:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-27 14:27:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:27:25,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:25,684 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:25,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:27:25,685 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1680413630, now seen corresponding path program 13 times [2020-10-27 14:27:25,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:25,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065567528] [2020-10-27 14:27:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:30,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:30,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:27:30,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:27:30,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:27:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:27:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:27:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:30,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:30,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:30,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:30,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:27:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:30,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:30,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:30,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:30,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:30,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:30,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:30,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:30,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:30,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:30,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-27 14:27:30,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065567528] [2020-10-27 14:27:30,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:30,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:27:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856380725] [2020-10-27 14:27:30,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:27:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:27:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:30,950 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2020-10-27 14:27:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:31,193 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-10-27 14:27:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:27:31,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-27 14:27:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:31,196 INFO L225 Difference]: With dead ends: 152 [2020-10-27 14:27:31,196 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:27:31,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:27:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 14:27:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:27:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-27 14:27:31,207 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 81 [2020-10-27 14:27:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:31,207 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-27 14:27:31,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:27:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-27 14:27:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:27:31,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:31,208 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:31,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:27:31,208 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1568225724, now seen corresponding path program 14 times [2020-10-27 14:27:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:31,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856843068] [2020-10-27 14:27:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:27:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:27:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:27:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:36,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:36,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:36,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-27 14:27:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-10-27 14:27:36,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856843068] [2020-10-27 14:27:36,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:36,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:27:36,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540879375] [2020-10-27 14:27:36,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:27:36,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:36,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:27:36,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:36,532 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 18 states. [2020-10-27 14:27:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:36,825 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-27 14:27:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:27:36,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-27 14:27:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:36,828 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:27:36,828 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:27:36,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 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 14:27:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:27:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-27 14:27:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:27:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-27 14:27:36,840 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 85 [2020-10-27 14:27:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:36,842 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-27 14:27:36,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:27:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-27 14:27:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:27:36,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:36,843 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:36,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:27:36,844 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:36,844 INFO L82 PathProgramCache]: Analyzing trace with hash -368395646, now seen corresponding path program 15 times [2020-10-27 14:27:36,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:36,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411164196] [2020-10-27 14:27:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:37,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:41,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:27:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:42,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:42,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:42,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:42,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:42,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:42,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-27 14:27:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:42,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:42,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:42,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:42,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-10-27 14:27:42,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411164196] [2020-10-27 14:27:42,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:42,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:27:42,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222649423] [2020-10-27 14:27:42,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:27:42,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:42,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:27:42,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:42,173 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 19 states. [2020-10-27 14:27:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:42,485 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2020-10-27 14:27:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:27:42,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-27 14:27:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:42,488 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:27:42,489 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:27:42,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:27:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-27 14:27:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:27:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-27 14:27:42,497 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2020-10-27 14:27:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:42,497 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-27 14:27:42,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:27:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-27 14:27:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:27:42,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:42,499 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:42,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:27:42,499 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1180710012, now seen corresponding path program 16 times [2020-10-27 14:27:42,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:42,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462904770] [2020-10-27 14:27:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:43,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:27:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:27:47,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:47,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:47,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:47,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:47,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:47,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:47,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 14:27:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2020-10-27 14:27:47,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462904770] [2020-10-27 14:27:47,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:47,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:27:47,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888795249] [2020-10-27 14:27:47,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:27:47,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:47,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:27:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:47,860 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 20 states. [2020-10-27 14:27:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:48,194 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2020-10-27 14:27:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:27:48,195 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-27 14:27:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:48,197 INFO L225 Difference]: With dead ends: 173 [2020-10-27 14:27:48,197 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 14:27:48,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 14:27:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-27 14:27:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 14:27:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-27 14:27:48,210 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 93 [2020-10-27 14:27:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:48,212 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-27 14:27:48,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:27:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-27 14:27:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:27:48,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:48,213 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:48,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:27:48,214 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash -434546494, now seen corresponding path program 17 times [2020-10-27 14:27:48,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:48,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851782178] [2020-10-27 14:27:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:48,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:48,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:53,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:27:53,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:53,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:53,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:53,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:53,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:53,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:53,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:53,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:27:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:53,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:53,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:53,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:53,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:53,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2020-10-27 14:27:53,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851782178] [2020-10-27 14:27:53,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:53,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:27:53,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718477019] [2020-10-27 14:27:53,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:27:53,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:27:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:27:53,601 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 21 states. [2020-10-27 14:27:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:53,927 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2020-10-27 14:27:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:27:53,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-10-27 14:27:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:53,928 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:27:53,928 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 14:27:53,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:27:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 14:27:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 14:27:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:27:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-27 14:27:53,948 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2020-10-27 14:27:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:53,949 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-27 14:27:53,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:27:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-27 14:27:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:27:53,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:53,952 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:53,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:27:53,952 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2125315900, now seen corresponding path program 18 times [2020-10-27 14:27:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:53,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445091235] [2020-10-27 14:27:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:54,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:54,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:59,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:59,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:27:59,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:59,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:59,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:59,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:59,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:59,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 14:27:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:59,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:59,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:59,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:59,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:59,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:59,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:59,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:59,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 2 proven. 171 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2020-10-27 14:27:59,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445091235] [2020-10-27 14:27:59,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:59,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:27:59,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222488991] [2020-10-27 14:27:59,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:27:59,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:59,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:27:59,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:27:59,405 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 22 states. [2020-10-27 14:27:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:59,712 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2020-10-27 14:27:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:27:59,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-10-27 14:27:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:59,714 INFO L225 Difference]: With dead ends: 187 [2020-10-27 14:27:59,714 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:27:59,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:27:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:27:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-27 14:27:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:27:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-10-27 14:27:59,733 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 101 [2020-10-27 14:27:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:59,733 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-10-27 14:27:59,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:27:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-10-27 14:27:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:27:59,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:59,735 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:59,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:27:59,735 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2116732674, now seen corresponding path program 19 times [2020-10-27 14:27:59,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:59,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047323261] [2020-10-27 14:27:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:59,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:04,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:28:04,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:04,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:28:04,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:28:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 14:28:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:28:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:28:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:05,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:05,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2020-10-27 14:28:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047323261] [2020-10-27 14:28:05,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:05,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:28:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059347913] [2020-10-27 14:28:05,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:28:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:28:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:05,199 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 23 states. [2020-10-27 14:28:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:05,503 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2020-10-27 14:28:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:28:05,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-10-27 14:28:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:05,506 INFO L225 Difference]: With dead ends: 194 [2020-10-27 14:28:05,506 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:28:05,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:28:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-27 14:28:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 14:28:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-27 14:28:05,516 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2020-10-27 14:28:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:05,516 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-27 14:28:05,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:28:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-27 14:28:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:28:05,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:05,518 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:05,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:28:05,518 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2083117564, now seen corresponding path program 20 times [2020-10-27 14:28:05,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:05,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068103647] [2020-10-27 14:28:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:05,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:06,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:10,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:28:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:10,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:10,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:10,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 14:28:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:10,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:10,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:10,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:10,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:10,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:10,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:10,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:10,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:10,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-10-27 14:28:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068103647] [2020-10-27 14:28:11,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:11,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:28:11,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687394632] [2020-10-27 14:28:11,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:28:11,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:28:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:11,005 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 24 states. [2020-10-27 14:28:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:11,421 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2020-10-27 14:28:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:28:11,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-10-27 14:28:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:11,425 INFO L225 Difference]: With dead ends: 201 [2020-10-27 14:28:11,425 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:28:11,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:28:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-27 14:28:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:28:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-10-27 14:28:11,442 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2020-10-27 14:28:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:11,442 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-10-27 14:28:11,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:28:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-10-27 14:28:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:28:11,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:11,444 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:11,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:28:11,445 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1889073854, now seen corresponding path program 21 times [2020-10-27 14:28:11,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:11,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482380282] [2020-10-27 14:28:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:11,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:11,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:16,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:28:16,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:28:16,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:28:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:28:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:28:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:16,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:16,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:16,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:16,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:16,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:16,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:16,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:16,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:16,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-27 14:28:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:16,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:16,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:16,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:16,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 2 proven. 231 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2020-10-27 14:28:16,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482380282] [2020-10-27 14:28:16,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:16,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:28:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119810243] [2020-10-27 14:28:16,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:28:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:28:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:16,971 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 25 states. [2020-10-27 14:28:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:17,265 INFO L93 Difference]: Finished difference Result 208 states and 219 transitions. [2020-10-27 14:28:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:28:17,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2020-10-27 14:28:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:17,268 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:28:17,269 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:28:17,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 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 14:28:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:28:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-27 14:28:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:28:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-27 14:28:17,277 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2020-10-27 14:28:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:17,277 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-27 14:28:17,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:28:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-27 14:28:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 14:28:17,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:17,279 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:17,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:28:17,279 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash 744717124, now seen corresponding path program 22 times [2020-10-27 14:28:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:17,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991986823] [2020-10-27 14:28:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:17,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:22,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:22,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:28:22,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:22,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:22,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:22,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 14:28:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:22,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:22,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:22,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:22,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2020-10-27 14:28:22,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991986823] [2020-10-27 14:28:22,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:22,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:28:22,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419511671] [2020-10-27 14:28:22,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:28:22,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:28:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:22,856 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 26 states. [2020-10-27 14:28:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:23,197 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2020-10-27 14:28:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:28:23,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2020-10-27 14:28:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:23,199 INFO L225 Difference]: With dead ends: 215 [2020-10-27 14:28:23,199 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 14:28:23,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 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 14:28:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 14:28:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-27 14:28:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 14:28:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-27 14:28:23,209 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 117 [2020-10-27 14:28:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:23,209 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-27 14:28:23,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:28:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-27 14:28:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:28:23,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:23,210 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:23,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:28:23,211 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:23,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1710625666, now seen corresponding path program 23 times [2020-10-27 14:28:23,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:23,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91595577] [2020-10-27 14:28:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:23,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:28:28,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:28,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:28:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:28:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:28:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:28:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:28,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:28,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:28,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:28,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:28,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-27 14:28:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:28,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:28,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2020-10-27 14:28:28,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91595577] [2020-10-27 14:28:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:28:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288156696] [2020-10-27 14:28:28,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:28:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:28:28,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:28:28,781 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 27 states. [2020-10-27 14:28:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:29,105 INFO L93 Difference]: Finished difference Result 222 states and 233 transitions. [2020-10-27 14:28:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:28:29,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-10-27 14:28:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:29,107 INFO L225 Difference]: With dead ends: 222 [2020-10-27 14:28:29,108 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:28:29,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 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 14:28:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:28:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-27 14:28:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:28:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-27 14:28:29,117 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2020-10-27 14:28:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:29,117 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-27 14:28:29,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:28:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-27 14:28:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:28:29,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:29,118 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:29,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:28:29,119 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1194475652, now seen corresponding path program 24 times [2020-10-27 14:28:29,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:29,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750728910] [2020-10-27 14:28:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:28:34,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:34,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:34,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-27 14:28:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:34,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:34,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:34,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:34,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 2 proven. 300 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-27 14:28:34,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750728910] [2020-10-27 14:28:34,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:34,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:28:34,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979271223] [2020-10-27 14:28:34,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:28:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:34,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:28:34,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:28:34,765 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-10-27 14:28:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:35,210 INFO L93 Difference]: Finished difference Result 229 states and 240 transitions. [2020-10-27 14:28:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:28:35,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-10-27 14:28:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:35,213 INFO L225 Difference]: With dead ends: 229 [2020-10-27 14:28:35,213 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 14:28:35,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 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 14:28:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 14:28:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-27 14:28:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:28:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-27 14:28:35,223 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 125 [2020-10-27 14:28:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:35,223 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-27 14:28:35,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:28:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-27 14:28:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 14:28:35,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:35,224 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:35,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:28:35,225 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1023406530, now seen corresponding path program 25 times [2020-10-27 14:28:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:35,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044105662] [2020-10-27 14:28:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:35,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:28:40,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:28:40,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:40,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:40,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:40,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:40,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-27 14:28:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:40,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:40,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:40,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:40,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 2 proven. 325 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2020-10-27 14:28:40,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044105662] [2020-10-27 14:28:40,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:40,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:28:40,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077697645] [2020-10-27 14:28:40,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:28:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:28:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:28:40,881 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 29 states. [2020-10-27 14:28:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:41,356 INFO L93 Difference]: Finished difference Result 236 states and 247 transitions. [2020-10-27 14:28:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:28:41,357 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-27 14:28:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:41,359 INFO L225 Difference]: With dead ends: 236 [2020-10-27 14:28:41,359 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:28:41,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 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 14:28:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:28:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-27 14:28:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:28:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-27 14:28:41,378 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2020-10-27 14:28:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:41,380 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-27 14:28:41,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:28:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-27 14:28:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 14:28:41,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:41,387 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:41,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:28:41,387 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2122680892, now seen corresponding path program 26 times [2020-10-27 14:28:41,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:41,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356828832] [2020-10-27 14:28:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:41,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:41,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:28:46,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:47,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:47,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:47,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:47,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:47,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:47,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-27 14:28:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:47,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:47,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:47,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:47,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:47,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 2 proven. 351 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2020-10-27 14:28:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356828832] [2020-10-27 14:28:47,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:47,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:28:47,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553800337] [2020-10-27 14:28:47,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:28:47,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:28:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:28:47,111 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 30 states. [2020-10-27 14:28:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:47,591 INFO L93 Difference]: Finished difference Result 243 states and 254 transitions. [2020-10-27 14:28:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:28:47,592 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2020-10-27 14:28:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:47,593 INFO L225 Difference]: With dead ends: 243 [2020-10-27 14:28:47,594 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 14:28:47,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 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 14:28:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 14:28:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-27 14:28:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 14:28:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2020-10-27 14:28:47,604 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 133 [2020-10-27 14:28:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:47,604 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2020-10-27 14:28:47,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:28:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2020-10-27 14:28:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:28:47,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:47,605 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:47,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:28:47,606 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1095983102, now seen corresponding path program 27 times [2020-10-27 14:28:47,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:47,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679265791] [2020-10-27 14:28:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:47,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:28:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:28:52,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:28:52,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:53,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:53,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:53,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:53,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:53,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-27 14:28:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:53,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:53,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:53,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:53,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:53,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:53,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:53,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2020-10-27 14:28:53,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679265791] [2020-10-27 14:28:53,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:53,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:28:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139497183] [2020-10-27 14:28:53,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:28:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:28:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:28:53,447 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 31 states. [2020-10-27 14:28:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:53,841 INFO L93 Difference]: Finished difference Result 250 states and 261 transitions. [2020-10-27 14:28:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:28:53,842 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 137 [2020-10-27 14:28:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:53,843 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:28:53,846 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:28:53,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:28:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:28:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-27 14:28:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:28:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-27 14:28:53,860 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2020-10-27 14:28:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:53,860 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-27 14:28:53,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:28:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-27 14:28:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 14:28:53,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:53,861 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:53,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:28:53,861 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash -378266876, now seen corresponding path program 28 times [2020-10-27 14:28:53,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:53,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614780969] [2020-10-27 14:28:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:54,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:58,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:28:58,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 14:28:58,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:28:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:28:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:28:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:59,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:59,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:59,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:59,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:59,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:59,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:59,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:59,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:59,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:59,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:59,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:59,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-27 14:28:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:59,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:59,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:59,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:59,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:59,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2020-10-27 14:28:59,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614780969] [2020-10-27 14:28:59,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:59,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:28:59,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322881919] [2020-10-27 14:28:59,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:28:59,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:28:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:28:59,645 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 32 states. [2020-10-27 14:29:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:00,192 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2020-10-27 14:29:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:29:00,193 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 141 [2020-10-27 14:29:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:00,195 INFO L225 Difference]: With dead ends: 257 [2020-10-27 14:29:00,195 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 14:29:00,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 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 14:29:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 14:29:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-27 14:29:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 14:29:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2020-10-27 14:29:00,203 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 141 [2020-10-27 14:29:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:00,203 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2020-10-27 14:29:00,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:29:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2020-10-27 14:29:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 14:29:00,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:00,204 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:00,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:29:00,204 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2078007742, now seen corresponding path program 29 times [2020-10-27 14:29:00,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:00,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3194340] [2020-10-27 14:29:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:00,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:29:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:29:05,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:06,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:06,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:06,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:06,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 14:29:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:06,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:06,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:06,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 2 proven. 435 refuted. 0 times theorem prover too weak. 1307 trivial. 0 not checked. [2020-10-27 14:29:06,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3194340] [2020-10-27 14:29:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:29:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325122459] [2020-10-27 14:29:06,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:29:06,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:29:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:06,045 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 33 states. [2020-10-27 14:29:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:06,439 INFO L93 Difference]: Finished difference Result 264 states and 275 transitions. [2020-10-27 14:29:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:29:06,440 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2020-10-27 14:29:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:06,441 INFO L225 Difference]: With dead ends: 264 [2020-10-27 14:29:06,441 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 14:29:06,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 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 14:29:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 14:29:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-27 14:29:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 14:29:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-27 14:29:06,451 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 145 [2020-10-27 14:29:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:06,452 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-27 14:29:06,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:29:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-27 14:29:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 14:29:06,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:06,453 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:06,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:29:06,453 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1851207748, now seen corresponding path program 30 times [2020-10-27 14:29:06,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:06,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790236479] [2020-10-27 14:29:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:11,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 14:29:11,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:11,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:29:11,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:11,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:29:11,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:29:11,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:29:11,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:12,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:12,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:12,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:12,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-27 14:29:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:12,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:12,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:12,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 1397 trivial. 0 not checked. [2020-10-27 14:29:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790236479] [2020-10-27 14:29:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:12,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:29:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724805038] [2020-10-27 14:29:12,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:29:12,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:29:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:12,348 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 34 states. [2020-10-27 14:29:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:12,914 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2020-10-27 14:29:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:29:12,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-10-27 14:29:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:12,918 INFO L225 Difference]: With dead ends: 271 [2020-10-27 14:29:12,918 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:29:12,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:29:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-27 14:29:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 14:29:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-10-27 14:29:12,932 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2020-10-27 14:29:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:12,932 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-10-27 14:29:12,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:29:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-10-27 14:29:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 14:29:12,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:12,934 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:12,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:29:12,934 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1785828222, now seen corresponding path program 31 times [2020-10-27 14:29:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594984251] [2020-10-27 14:29:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:12,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:17,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:29:17,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:17,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:29:17,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:29:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:29:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:29:17,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:18,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:18,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:18,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 14:29:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:18,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2020-10-27 14:29:18,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594984251] [2020-10-27 14:29:18,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:18,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:29:18,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312079852] [2020-10-27 14:29:18,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:29:18,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:18,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:29:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:18,893 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 35 states. [2020-10-27 14:29:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:19,361 INFO L93 Difference]: Finished difference Result 278 states and 289 transitions. [2020-10-27 14:29:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:29:19,362 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 153 [2020-10-27 14:29:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:19,363 INFO L225 Difference]: With dead ends: 278 [2020-10-27 14:29:19,363 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:29:19,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 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 14:29:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:29:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-27 14:29:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 14:29:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2020-10-27 14:29:19,380 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 153 [2020-10-27 14:29:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:19,381 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2020-10-27 14:29:19,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:29:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2020-10-27 14:29:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 14:29:19,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:19,382 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:19,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:29:19,382 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1616622980, now seen corresponding path program 32 times [2020-10-27 14:29:19,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:19,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140642653] [2020-10-27 14:29:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:19,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:19,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:20,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:24,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:29:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:25,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-27 14:29:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:25,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:25,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:25,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:25,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 2 proven. 528 refuted. 0 times theorem prover too weak. 1586 trivial. 0 not checked. [2020-10-27 14:29:25,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140642653] [2020-10-27 14:29:25,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:25,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:29:25,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509452763] [2020-10-27 14:29:25,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:29:25,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:25,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:29:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:29:25,393 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2020-10-27 14:29:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:25,963 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2020-10-27 14:29:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:29:25,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 157 [2020-10-27 14:29:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:25,966 INFO L225 Difference]: With dead ends: 285 [2020-10-27 14:29:25,967 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 14:29:25,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:29:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 14:29:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-27 14:29:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:29:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-27 14:29:25,979 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 157 [2020-10-27 14:29:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:25,979 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-27 14:29:25,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:29:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-27 14:29:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 14:29:25,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:25,981 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:25,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:29:25,981 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash -367818046, now seen corresponding path program 33 times [2020-10-27 14:29:25,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:25,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326961964] [2020-10-27 14:29:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:26,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:26,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:31,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:29:31,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:31,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:29:31,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:31,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:29:31,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:29:31,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:29:31,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:31,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:31,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:31,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:31,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:31,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-27 14:29:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:31,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:31,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:31,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:31,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2248 backedges. 2 proven. 561 refuted. 0 times theorem prover too weak. 1685 trivial. 0 not checked. [2020-10-27 14:29:32,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326961964] [2020-10-27 14:29:32,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:32,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:29:32,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266894806] [2020-10-27 14:29:32,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:29:32,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:32,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:29:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:29:32,002 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 37 states. [2020-10-27 14:29:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:32,599 INFO L93 Difference]: Finished difference Result 292 states and 303 transitions. [2020-10-27 14:29:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:29:32,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-10-27 14:29:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:32,601 INFO L225 Difference]: With dead ends: 292 [2020-10-27 14:29:32,601 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:29:32,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 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 14:29:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:29:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-27 14:29:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:29:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-27 14:29:32,611 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 161 [2020-10-27 14:29:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:32,612 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-27 14:29:32,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:29:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-27 14:29:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 14:29:32,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:32,613 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:32,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:29:32,613 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:32,614 INFO L82 PathProgramCache]: Analyzing trace with hash -256267580, now seen corresponding path program 34 times [2020-10-27 14:29:32,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:32,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539412182] [2020-10-27 14:29:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:32,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:37,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:37,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 14:29:37,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:37,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:29:37,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:29:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:29:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:29:37,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:38,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:38,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:38,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:38,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:38,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:38,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:38,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:38,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-27 14:29:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:38,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:38,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:38,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:38,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:38,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:38,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 2 proven. 595 refuted. 0 times theorem prover too weak. 1787 trivial. 0 not checked. [2020-10-27 14:29:38,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539412182] [2020-10-27 14:29:38,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:38,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:29:38,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392777722] [2020-10-27 14:29:38,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:29:38,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:29:38,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:29:38,724 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 38 states. [2020-10-27 14:29:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:39,235 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2020-10-27 14:29:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:29:39,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 165 [2020-10-27 14:29:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:39,237 INFO L225 Difference]: With dead ends: 299 [2020-10-27 14:29:39,237 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 14:29:39,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 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 14:29:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 14:29:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-27 14:29:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 14:29:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-27 14:29:39,248 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 165 [2020-10-27 14:29:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:39,248 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-27 14:29:39,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:29:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-27 14:29:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 14:29:39,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:39,250 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:39,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:29:39,250 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -405047038, now seen corresponding path program 35 times [2020-10-27 14:29:39,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:39,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129918467] [2020-10-27 14:29:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:39,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:39,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:44,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:29:44,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:45,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:45,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:45,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:45,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:45,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:45,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:45,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:45,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:45,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:45,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:45,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-27 14:29:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:45,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:45,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2524 backedges. 2 proven. 630 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-27 14:29:45,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129918467] [2020-10-27 14:29:45,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:45,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:29:45,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641687698] [2020-10-27 14:29:45,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:29:45,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:29:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:29:45,403 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 39 states. [2020-10-27 14:29:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:46,043 INFO L93 Difference]: Finished difference Result 306 states and 317 transitions. [2020-10-27 14:29:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:29:46,044 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 169 [2020-10-27 14:29:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:46,045 INFO L225 Difference]: With dead ends: 306 [2020-10-27 14:29:46,045 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:29:46,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 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 14:29:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:29:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-27 14:29:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 14:29:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-27 14:29:46,058 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 169 [2020-10-27 14:29:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:46,058 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-27 14:29:46,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:29:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-27 14:29:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:29:46,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:46,061 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:46,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:29:46,061 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1314320380, now seen corresponding path program 36 times [2020-10-27 14:29:46,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:46,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26221220] [2020-10-27 14:29:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:51,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:29:51,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:52,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:52,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:29:52,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-10-27 14:29:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 2 proven. 666 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2020-10-27 14:29:52,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26221220] [2020-10-27 14:29:52,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:52,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:29:52,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394065379] [2020-10-27 14:29:52,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:29:52,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:52,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:29:52,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:29:52,302 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 40 states. [2020-10-27 14:29:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:52,753 INFO L93 Difference]: Finished difference Result 313 states and 324 transitions. [2020-10-27 14:29:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:29:52,753 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 173 [2020-10-27 14:29:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:52,755 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:29:52,755 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:29:52,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 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 14:29:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:29:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-27 14:29:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 14:29:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-10-27 14:29:52,765 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 173 [2020-10-27 14:29:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:52,765 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-10-27 14:29:52,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:29:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-10-27 14:29:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 14:29:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:52,767 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:52,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:29:52,767 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:52,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:52,767 INFO L82 PathProgramCache]: Analyzing trace with hash -468830398, now seen corresponding path program 37 times [2020-10-27 14:29:52,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:52,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842439195] [2020-10-27 14:29:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 14:29:57,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:57,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 14:29:57,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:29:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 14:29:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:29:57,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:59,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:59,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:59,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:59,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:59,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-27 14:29:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:59,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:59,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:59,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:59,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 2 proven. 703 refuted. 0 times theorem prover too weak. 2111 trivial. 0 not checked. [2020-10-27 14:29:59,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842439195] [2020-10-27 14:29:59,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:59,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:29:59,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064971213] [2020-10-27 14:29:59,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:29:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:59,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:29:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:29:59,093 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 41 states. [2020-10-27 14:29:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:59,695 INFO L93 Difference]: Finished difference Result 320 states and 331 transitions. [2020-10-27 14:29:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:29:59,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 177 [2020-10-27 14:29:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:59,697 INFO L225 Difference]: With dead ends: 320 [2020-10-27 14:29:59,697 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 14:29:59,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 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 14:29:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 14:29:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-27 14:29:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-27 14:29:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-27 14:29:59,709 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 177 [2020-10-27 14:29:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:59,709 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-27 14:29:59,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:29:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-27 14:29:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 14:29:59,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:59,711 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:59,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:29:59,711 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash 375514436, now seen corresponding path program 38 times [2020-10-27 14:29:59,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:59,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437097790] [2020-10-27 14:29:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:00,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:30:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0