/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:17:22,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:17:22,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:17:22,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:17:22,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:17:22,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:17:22,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:17:22,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:17:22,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:17:22,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:17:22,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:17:22,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:17:22,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:17:22,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:17:22,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:17:22,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:17:22,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:17:22,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:17:22,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:17:22,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:17:22,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:17:22,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:17:22,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:17:22,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:17:22,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:17:22,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:17:22,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:17:22,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:17:22,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:17:22,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:17:22,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:17:22,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:17:22,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:17:22,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:17:22,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:17:22,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:17:22,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:17:22,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:17:22,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:17:22,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:17:22,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:17:22,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:17:22,830 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:17:22,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:17:22,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:17:22,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:17:22,835 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:17:22,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:17:22,835 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:17:22,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:17:22,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:17:22,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:17:22,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:17:22,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:17:22,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:17:22,837 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:17:22,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:17:22,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:17:22,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:17:22,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:17:22,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:17:22,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:17:22,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:17:22,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:17:22,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:17:22,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:17:22,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:17:22,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:17:22,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:17:22,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:17:22,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:17:22,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:17:23,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:17:23,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:17:23,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:17:23,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:17:23,348 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:17:23,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-26 19:17:23,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26f41a3f8/5cfca3f16d7e4a5f9183f94433260f18/FLAGde7dd7f24 [2020-10-26 19:17:24,032 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:17:24,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-26 19:17:24,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26f41a3f8/5cfca3f16d7e4a5f9183f94433260f18/FLAGde7dd7f24 [2020-10-26 19:17:24,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26f41a3f8/5cfca3f16d7e4a5f9183f94433260f18 [2020-10-26 19:17:24,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:17:24,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:17:24,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:24,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:17:24,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:17:24,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a1cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24, skipping insertion in model container [2020-10-26 19:17:24,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:17:24,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:17:24,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:24,643 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:17:24,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:24,683 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:17:24,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24 WrapperNode [2020-10-26 19:17:24,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:24,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:17:24,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:17:24,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:17:24,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... [2020-10-26 19:17:24,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:17:24,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:17:24,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:17:24,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:17:24,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:17:24,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:17:24,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:17:24,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:17:24,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:17:24,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:17:24,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:17:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:17:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:17:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:17:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:17:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:17:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:17:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:17:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:17:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:17:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:17:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:17:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:17:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:17:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:17:25,189 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:17:25,190 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:17:25,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:25 BoogieIcfgContainer [2020-10-26 19:17:25,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:17:25,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:17:25,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:17:25,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:17:25,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:17:24" (1/3) ... [2020-10-26 19:17:25,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f33baee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:25, skipping insertion in model container [2020-10-26 19:17:25,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:24" (2/3) ... [2020-10-26 19:17:25,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f33baee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:25, skipping insertion in model container [2020-10-26 19:17:25,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:25" (3/3) ... [2020-10-26 19:17:25,201 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2020-10-26 19:17:25,213 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:17:25,218 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:17:25,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:17:25,265 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:17:25,265 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:17:25,265 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:17:25,265 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:17:25,265 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:17:25,266 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:17:25,266 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:17:25,266 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:17:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:17:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:17:25,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:25,293 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] [2020-10-26 19:17:25,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2093384956, now seen corresponding path program 1 times [2020-10-26 19:17:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:25,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604469482] [2020-10-26 19:17:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:25,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:26,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:17:26,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:26,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-26 19:17:26,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:17:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:17:26,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:26,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:26,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:26,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:17:26,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:26,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:26,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:26,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:26,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:17:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:26,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604469482] [2020-10-26 19:17:26,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:26,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:17:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25642796] [2020-10-26 19:17:26,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:17:26,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:17:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:26,225 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-26 19:17:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:26,371 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-10-26 19:17:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:17:26,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-26 19:17:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:26,386 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:17:26,387 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:17:26,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:17:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 19:17:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:17:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:17:26,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-26 19:17:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:26,438 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:17:26,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:17:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:17:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:17:26,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:26,439 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] [2020-10-26 19:17:26,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:17:26,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1295233002, now seen corresponding path program 1 times [2020-10-26 19:17:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:26,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87727281] [2020-10-26 19:17:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:27,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:17:27,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-26 19:17:27,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:17:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:17:27,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:27,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:27,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:27,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:27,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:17:27,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:27,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:27,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87727281] [2020-10-26 19:17:27,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:27,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:17:27,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891490198] [2020-10-26 19:17:27,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:17:27,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:17:27,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:27,168 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 4 states. [2020-10-26 19:17:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:27,307 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-26 19:17:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:17:27,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 19:17:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:27,309 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:17:27,309 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:17:27,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:17:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:17:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:17:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-26 19:17:27,330 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2020-10-26 19:17:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:27,331 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-26 19:17:27,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:17:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-26 19:17:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:17:27,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:27,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:27,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:17:27,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1849734584, now seen corresponding path program 1 times [2020-10-26 19:17:27,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:27,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442949401] [2020-10-26 19:17:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:27,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:27,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:17:27,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-26 19:17:27,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:17:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:17:27,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:27,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:27,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:27,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:27,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:27,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:17:27,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:27,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:27,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442949401] [2020-10-26 19:17:27,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:27,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:17:27,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494056054] [2020-10-26 19:17:27,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:17:27,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:27,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:17:27,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:27,912 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-10-26 19:17:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:27,993 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-26 19:17:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:17:27,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:17:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:27,995 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:17:27,995 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:17:27,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:17:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:17:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:17:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-26 19:17:28,002 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2020-10-26 19:17:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:28,003 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-26 19:17:28,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:17:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-26 19:17:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:17:28,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:28,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:28,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:17:28,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:28,005 INFO L82 PathProgramCache]: Analyzing trace with hash -506608346, now seen corresponding path program 2 times [2020-10-26 19:17:28,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:28,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933666132] [2020-10-26 19:17:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:28,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:17:28,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-26 19:17:28,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:17:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:17:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:28,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:28,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:28,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:28,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:28,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:28,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:28,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:28,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:28,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:28,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933666132] [2020-10-26 19:17:28,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:28,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:17:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931054928] [2020-10-26 19:17:28,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:17:28,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:17:28,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:17:28,718 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-10-26 19:17:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:28,808 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-26 19:17:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:17:28,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-26 19:17:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:28,810 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:17:28,810 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:17:28,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:17:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:17:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:17:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:17:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:17:28,818 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2020-10-26 19:17:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:28,818 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:17:28,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:17:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:17:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:28,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:28,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:28,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:17:28,820 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1747517572, now seen corresponding path program 3 times [2020-10-26 19:17:28,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:28,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605676837] [2020-10-26 19:17:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:29,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:29,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-26 19:17:29,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:17:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:17:29,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:29,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:29,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:29,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:29,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:17:29,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:29,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:29,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:29,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:29,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605676837] [2020-10-26 19:17:29,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:29,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:17:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275189057] [2020-10-26 19:17:29,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:17:29,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:17:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:17:29,833 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 7 states. [2020-10-26 19:17:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:29,977 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-26 19:17:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:17:29,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-26 19:17:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:29,979 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:17:29,979 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:17:29,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:17:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:17:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:17:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:17:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:17:29,992 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-26 19:17:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:29,995 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:17:29,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:17:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:17:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:17:29,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:29,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:29,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:17:29,997 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash -995959710, now seen corresponding path program 4 times [2020-10-26 19:17:29,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:29,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218427228] [2020-10-26 19:17:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:30,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:30,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:30,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:30,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:31,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:17:31,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:31,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1252 [2020-10-26 19:17:31,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:17:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:31,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:17:31,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:31,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:31,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:31,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:17:31,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:31,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218427228] [2020-10-26 19:17:31,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:31,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:17:31,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993705525] [2020-10-26 19:17:31,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:17:31,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:17:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:17:31,377 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-26 19:17:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:31,502 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-26 19:17:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:17:31,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-26 19:17:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:31,503 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:17:31,503 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:17:31,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:17:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:17:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:17:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:17:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:17:31,511 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2020-10-26 19:17:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:31,511 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:17:31,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:17:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:17:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:17:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:31,512 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:31,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:17:31,513 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash -367707968, now seen corresponding path program 5 times [2020-10-26 19:17:31,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:31,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891210189] [2020-10-26 19:17:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:33,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:33,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:17:33,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:33,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-26 19:17:33,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:33,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:17:33,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:17:33,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:33,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:33,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:33,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:33,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:33,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:33,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891210189] [2020-10-26 19:17:33,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:33,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:17:33,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736969526] [2020-10-26 19:17:33,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:17:33,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:17:33,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:17:33,167 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2020-10-26 19:17:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:33,273 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-26 19:17:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:17:33,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-26 19:17:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:33,275 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:17:33,275 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:17:33,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:17:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:17:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:17:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:17:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:17:33,282 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2020-10-26 19:17:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:33,282 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:17:33,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:17:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:17:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:17:33,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:33,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:33,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:17:33,284 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2086794654, now seen corresponding path program 6 times [2020-10-26 19:17:33,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:33,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904613703] [2020-10-26 19:17:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:33,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:33,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:33,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:35,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:17:35,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:35,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-26 19:17:35,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:35,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:17:35,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:35,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:17:35,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:35,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:35,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:35,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:35,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:35,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:35,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904613703] [2020-10-26 19:17:35,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:35,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:17:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455219753] [2020-10-26 19:17:35,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:17:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:17:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:17:35,220 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2020-10-26 19:17:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:35,325 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-26 19:17:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:17:35,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-26 19:17:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:35,327 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:17:35,327 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:17:35,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:17:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:17:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:17:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:17:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-26 19:17:35,334 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 33 [2020-10-26 19:17:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:35,334 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-26 19:17:35,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:17:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-26 19:17:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:17:35,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:35,335 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:35,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:17:35,336 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1368198404, now seen corresponding path program 7 times [2020-10-26 19:17:35,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:35,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421087028] [2020-10-26 19:17:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:35,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:37,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1943 [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:17:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:37,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:37,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:37,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:37,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:37,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421087028] [2020-10-26 19:17:37,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:37,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:17:37,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728707296] [2020-10-26 19:17:37,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:17:37,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:17:37,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:17:37,410 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 11 states. [2020-10-26 19:17:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:37,565 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-26 19:17:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:17:37,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-26 19:17:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:37,568 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:17:37,568 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:17:37,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:17:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:17:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:17:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:17:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:17:37,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2020-10-26 19:17:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:37,578 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:17:37,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:17:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:17:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:17:37,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:37,582 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:37,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:17:37,582 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1606807334, now seen corresponding path program 8 times [2020-10-26 19:17:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:37,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613928092] [2020-10-26 19:17:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:37,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:39,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:17:39,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:39,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2385 [2020-10-26 19:17:39,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:39,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:17:39,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:39,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:17:39,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:40,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:40,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:40,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:40,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613928092] [2020-10-26 19:17:40,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:40,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:17:40,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943930625] [2020-10-26 19:17:40,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:17:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:17:40,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:17:40,136 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2020-10-26 19:17:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:40,238 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-26 19:17:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:17:40,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-26 19:17:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:40,240 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:17:40,240 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:17:40,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:17:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:17:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:17:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:17:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-26 19:17:40,247 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2020-10-26 19:17:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:40,248 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-26 19:17:40,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:17:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-26 19:17:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:17:40,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:40,253 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:40,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:17:40,253 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1018244920, now seen corresponding path program 9 times [2020-10-26 19:17:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350523483] [2020-10-26 19:17:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:40,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:42,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:17:42,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:42,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2431 [2020-10-26 19:17:42,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:42,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:17:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:17:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:42,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:42,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:42,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350523483] [2020-10-26 19:17:42,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:42,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:17:42,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619714494] [2020-10-26 19:17:42,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:17:42,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:42,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:17:42,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:17:42,844 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 13 states. [2020-10-26 19:17:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:42,983 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-26 19:17:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:17:42,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-26 19:17:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:42,985 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:17:42,985 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:17:42,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:17:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:17:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:17:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:17:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:17:42,999 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 39 [2020-10-26 19:17:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:42,999 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:17:42,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:17:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:17:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:17:43,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:43,003 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:43,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:17:43,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:43,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1747309034, now seen corresponding path program 10 times [2020-10-26 19:17:43,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:43,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113154219] [2020-10-26 19:17:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:17:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:45,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:45,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:45,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:45,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113154219] [2020-10-26 19:17:45,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:17:45,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017233257] [2020-10-26 19:17:45,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:17:45,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:17:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:17:45,688 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 14 states. [2020-10-26 19:17:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:45,833 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:17:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:17:45,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-26 19:17:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:45,834 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:17:45,835 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:17:45,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:17:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:17:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:17:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:17:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:17:45,841 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2020-10-26 19:17:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:45,841 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:17:45,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:17:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:17:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:17:45,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:45,842 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:45,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:17:45,842 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:45,843 INFO L82 PathProgramCache]: Analyzing trace with hash -859902604, now seen corresponding path program 11 times [2020-10-26 19:17:45,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:45,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670193270] [2020-10-26 19:17:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:48,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:17:48,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:48,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2929 [2020-10-26 19:17:48,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:48,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:17:48,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:17:48,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:48,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:48,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:48,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:48,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:48,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:48,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:48,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:48,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670193270] [2020-10-26 19:17:48,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:48,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:17:48,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953941411] [2020-10-26 19:17:48,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:17:48,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:48,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:17:48,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:17:48,971 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 15 states. [2020-10-26 19:17:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:49,079 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-26 19:17:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:17:49,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-26 19:17:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:49,081 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:17:49,081 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:17:49,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:17:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:17:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:17:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:17:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-26 19:17:49,094 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2020-10-26 19:17:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:49,095 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-26 19:17:49,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:17:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-26 19:17:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:17:49,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:49,098 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:49,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:17:49,098 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1534152018, now seen corresponding path program 12 times [2020-10-26 19:17:49,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:49,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466016465] [2020-10-26 19:17:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:17:52,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3061 [2020-10-26 19:17:52,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:17:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:17:52,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:52,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:52,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:52,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:52,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:52,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:52,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:52,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:52,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466016465] [2020-10-26 19:17:52,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:52,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:17:52,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580081283] [2020-10-26 19:17:52,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:17:52,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:52,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:17:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:17:52,371 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2020-10-26 19:17:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:52,524 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-26 19:17:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:17:52,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-26 19:17:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:52,526 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:17:52,526 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:17:52,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:17:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:17:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:17:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:17:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:17:52,532 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 45 [2020-10-26 19:17:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:52,532 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:17:52,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:17:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:17:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:17:52,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:52,533 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:52,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:17:52,533 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 118173104, now seen corresponding path program 13 times [2020-10-26 19:17:52,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:52,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319550649] [2020-10-26 19:17:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:55,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:17:55,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2784 [2020-10-26 19:17:55,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:17:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:17:55,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:55,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:55,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:55,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319550649] [2020-10-26 19:17:55,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:55,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:17:55,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824396887] [2020-10-26 19:17:55,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:17:55,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:55,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:17:55,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:17:55,548 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 17 states. [2020-10-26 19:17:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:55,668 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-26 19:17:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:17:55,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-26 19:17:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:55,670 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:17:55,670 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:17:55,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:17:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:17:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:17:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:17:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:17:55,683 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2020-10-26 19:17:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:55,683 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:17:55,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:17:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:17:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:17:55,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:55,685 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:55,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:17:55,685 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash 867069582, now seen corresponding path program 14 times [2020-10-26 19:17:55,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:55,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949679359] [2020-10-26 19:17:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:58,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:17:58,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:17:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3283 [2020-10-26 19:17:58,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:17:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:17:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:59,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:59,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:59,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:59,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:17:59,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:59,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949679359] [2020-10-26 19:17:59,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:59,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:17:59,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875506206] [2020-10-26 19:17:59,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:17:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:17:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:17:59,228 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 18 states. [2020-10-26 19:17:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:59,333 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-26 19:17:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:17:59,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-26 19:17:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:59,334 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:17:59,334 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:17:59,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:17:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:17:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:17:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:17:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-26 19:17:59,339 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2020-10-26 19:17:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:59,340 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-26 19:17:59,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:17:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-26 19:17:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:17:59,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:59,341 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:59,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:17:59,341 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash -997920788, now seen corresponding path program 15 times [2020-10-26 19:17:59,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:59,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536897734] [2020-10-26 19:17:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:59,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:59,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:02,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3146 [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:18:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:02,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:02,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:02,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:02,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:02,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:02,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536897734] [2020-10-26 19:18:02,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:02,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:18:02,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950583758] [2020-10-26 19:18:02,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:18:02,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:18:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:18:02,736 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 19 states. [2020-10-26 19:18:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:02,899 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-26 19:18:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:18:02,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-26 19:18:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:02,901 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:18:02,901 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:18:02,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:18:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:18:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:18:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:18:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-26 19:18:02,916 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2020-10-26 19:18:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:02,917 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-26 19:18:02,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:18:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-26 19:18:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:18:02,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:02,918 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:02,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:18:02,918 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2042663370, now seen corresponding path program 16 times [2020-10-26 19:18:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:02,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177937419] [2020-10-26 19:18:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:02,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:06,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:18:06,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3632 [2020-10-26 19:18:06,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:18:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:18:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:06,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:06,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:06,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:06,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:06,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:06,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:06,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177937419] [2020-10-26 19:18:06,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:06,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:18:06,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589143064] [2020-10-26 19:18:06,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:18:06,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:18:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:18:06,829 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 20 states. [2020-10-26 19:18:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:07,012 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-26 19:18:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:18:07,013 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-26 19:18:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:07,013 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:18:07,013 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:18:07,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:18:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:18:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:18:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:18:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-26 19:18:07,020 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2020-10-26 19:18:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:07,021 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-26 19:18:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:18:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-26 19:18:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:18:07,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:07,023 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:07,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:18:07,023 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash -828689368, now seen corresponding path program 17 times [2020-10-26 19:18:07,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:07,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249685725] [2020-10-26 19:18:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:07,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:07,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:10,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3672 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:18:10,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:10,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:10,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:10,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:10,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:10,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:10,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:11,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249685725] [2020-10-26 19:18:11,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:11,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:18:11,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971207619] [2020-10-26 19:18:11,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:18:11,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:18:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:18:11,005 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 21 states. [2020-10-26 19:18:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:11,234 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-26 19:18:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:18:11,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-26 19:18:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:11,235 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:18:11,235 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:18:11,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:18:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:18:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:18:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:18:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-26 19:18:11,244 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2020-10-26 19:18:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:11,244 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-26 19:18:11,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:18:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-26 19:18:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:18:11,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:11,245 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:11,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:18:11,246 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1465300742, now seen corresponding path program 18 times [2020-10-26 19:18:11,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:11,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800818421] [2020-10-26 19:18:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:11,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4047 [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:18:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:15,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:18:15,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:15,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:15,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:15,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:15,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800818421] [2020-10-26 19:18:15,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:15,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:18:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221961083] [2020-10-26 19:18:15,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:18:15,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:15,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:18:15,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:18:15,627 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 22 states. [2020-10-26 19:18:15,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:15,840 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-26 19:18:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:18:15,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-26 19:18:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:15,841 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:18:15,841 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:18:15,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:18:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:18:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:18:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:18:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-26 19:18:15,849 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 57 [2020-10-26 19:18:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:15,850 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-26 19:18:15,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:18:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-26 19:18:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:18:15,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:15,851 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:15,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:18:15,852 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1623393692, now seen corresponding path program 19 times [2020-10-26 19:18:15,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:15,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631428059] [2020-10-26 19:18:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:15,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4254 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:18:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:20,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:20,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:20,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:20,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:20,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:20,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631428059] [2020-10-26 19:18:20,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:20,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:18:20,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176856462] [2020-10-26 19:18:20,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:18:20,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:20,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:18:20,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:18:20,464 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 23 states. [2020-10-26 19:18:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:20,707 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-26 19:18:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:18:20,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-26 19:18:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:20,709 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:18:20,709 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:18:20,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:18:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:18:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:18:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:18:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-26 19:18:20,714 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 59 [2020-10-26 19:18:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:20,715 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-26 19:18:20,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:18:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-26 19:18:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:18:20,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:20,716 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:20,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:18:20,716 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2036343230, now seen corresponding path program 20 times [2020-10-26 19:18:20,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:20,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943293997] [2020-10-26 19:18:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:20,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:21,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:18:25,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4413 [2020-10-26 19:18:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:18:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:18:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:25,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:25,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:25,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:25,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:25,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:25,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943293997] [2020-10-26 19:18:25,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:25,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:18:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069975372] [2020-10-26 19:18:25,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:18:25,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:18:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:18:25,466 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 24 states. [2020-10-26 19:18:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:25,660 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-26 19:18:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:18:25,662 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2020-10-26 19:18:25,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:25,663 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:18:25,663 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:18:25,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:18:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:18:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:18:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:18:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-26 19:18:25,672 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 61 [2020-10-26 19:18:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:25,672 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-26 19:18:25,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:18:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-26 19:18:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:18:25,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:25,673 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:25,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:18:25,673 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash 551109280, now seen corresponding path program 21 times [2020-10-26 19:18:25,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:25,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67688030] [2020-10-26 19:18:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:25,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:25,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:18:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:31,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:31,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:31,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67688030] [2020-10-26 19:18:31,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:31,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:18:31,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722824875] [2020-10-26 19:18:31,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:18:31,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:31,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:18:31,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:18:31,048 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 25 states. [2020-10-26 19:18:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:31,238 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-26 19:18:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:18:31,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-26 19:18:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:31,239 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:18:31,240 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:18:31,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:18:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:18:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:18:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:18:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-26 19:18:31,245 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 63 [2020-10-26 19:18:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:31,245 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-26 19:18:31,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:18:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-26 19:18:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:18:31,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:31,246 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:31,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:18:31,246 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash 306907006, now seen corresponding path program 22 times [2020-10-26 19:18:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:31,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93543364] [2020-10-26 19:18:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:31,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:32,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:18:36,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:36,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:36,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:36,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:36,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:36,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:36,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:36,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:36,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93543364] [2020-10-26 19:18:36,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:36,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:18:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272388591] [2020-10-26 19:18:36,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:18:36,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:18:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:18:36,666 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 26 states. [2020-10-26 19:18:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:36,920 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-26 19:18:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:18:36,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-26 19:18:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:36,921 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:18:36,921 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:18:36,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:18:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:18:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:18:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:18:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-26 19:18:36,927 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 65 [2020-10-26 19:18:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:36,928 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-26 19:18:36,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:18:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-26 19:18:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:18:36,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:36,929 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:36,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:18:36,929 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1851722972, now seen corresponding path program 23 times [2020-10-26 19:18:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:36,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695977565] [2020-10-26 19:18:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:37,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:18:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:41,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:18:41,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:42,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:42,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:42,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:42,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:42,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:42,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:42,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:42,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695977565] [2020-10-26 19:18:42,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:18:42,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811009901] [2020-10-26 19:18:42,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:18:42,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:42,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:18:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:18:42,376 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 27 states. [2020-10-26 19:18:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:42,627 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-26 19:18:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:18:42,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-26 19:18:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:42,629 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:18:42,629 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:18:42,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:18:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:18:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:18:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:18:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-26 19:18:42,634 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 67 [2020-10-26 19:18:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:42,634 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-26 19:18:42,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:18:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-26 19:18:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:18:42,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:42,635 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:42,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:18:42,635 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash 361181882, now seen corresponding path program 24 times [2020-10-26 19:18:42,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:42,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975302280] [2020-10-26 19:18:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:47,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:18:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:48,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:48,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:48,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:48,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:48,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975302280] [2020-10-26 19:18:48,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:48,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:18:48,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264683120] [2020-10-26 19:18:48,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:18:48,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:18:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:18:48,132 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 28 states. [2020-10-26 19:18:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:48,365 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-26 19:18:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:18:48,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 69 [2020-10-26 19:18:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:48,367 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:18:48,367 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:18:48,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:18:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:18:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:18:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:18:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-26 19:18:48,378 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2020-10-26 19:18:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:48,378 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-26 19:18:48,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:18:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-26 19:18:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:18:48,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:48,379 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:48,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:18:48,379 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1824696040, now seen corresponding path program 25 times [2020-10-26 19:18:48,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:48,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862075159] [2020-10-26 19:18:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:48,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:53,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:53,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:18:53,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:53,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:18:53,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:53,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:18:53,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:53,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:18:53,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:53,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:53,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:53,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:53,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:53,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:53,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:53,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:53,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:53,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862075159] [2020-10-26 19:18:53,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:53,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:18:53,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776098633] [2020-10-26 19:18:53,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:18:53,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:18:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:18:53,902 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 29 states. [2020-10-26 19:18:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:54,073 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-26 19:18:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:18:54,073 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 71 [2020-10-26 19:18:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:54,074 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:18:54,074 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:18:54,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:18:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:18:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:18:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:18:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-26 19:18:54,080 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 71 [2020-10-26 19:18:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:54,081 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-26 19:18:54,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:18:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-26 19:18:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:18:54,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:54,082 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:54,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:18:54,082 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2080595958, now seen corresponding path program 26 times [2020-10-26 19:18:54,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:54,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415085775] [2020-10-26 19:18:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:54,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:18:59,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:59,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:59,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:59,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:59,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:59,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:59,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415085775] [2020-10-26 19:18:59,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:59,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:18:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907233552] [2020-10-26 19:18:59,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:18:59,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:18:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:18:59,644 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 30 states. [2020-10-26 19:18:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:59,889 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-26 19:18:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:18:59,890 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 73 [2020-10-26 19:18:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:59,891 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:18:59,891 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:18:59,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:18:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:18:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:18:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:18:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-26 19:18:59,895 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 73 [2020-10-26 19:18:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:59,896 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-26 19:18:59,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:18:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-26 19:18:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:18:59,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:59,900 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:59,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:18:59,900 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1264789332, now seen corresponding path program 27 times [2020-10-26 19:18:59,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:59,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95078159] [2020-10-26 19:18:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:59,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:04,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:19:04,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:04,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:19:04,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:19:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:19:04,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:05,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:05,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:05,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:05,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95078159] [2020-10-26 19:19:05,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:05,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:19:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021569656] [2020-10-26 19:19:05,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:19:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:19:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:19:05,483 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 31 states. [2020-10-26 19:19:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:05,765 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-26 19:19:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:19:05,765 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-26 19:19:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:05,767 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:19:05,767 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:19:05,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:19:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:19:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:19:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:19:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-26 19:19:05,774 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 75 [2020-10-26 19:19:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:05,775 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-26 19:19:05,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:19:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-26 19:19:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:19:05,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:05,776 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:05,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:19:05,776 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:05,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1041330382, now seen corresponding path program 28 times [2020-10-26 19:19:05,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:05,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60596551] [2020-10-26 19:19:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:10,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:19:10,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:10,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:19:10,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:10,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:19:10,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:10,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:19:10,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:11,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:11,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:11,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:11,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:11,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:11,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:11,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:11,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:11,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:11,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60596551] [2020-10-26 19:19:11,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:11,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:19:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784531763] [2020-10-26 19:19:11,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:19:11,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:19:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:19:11,406 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 32 states. [2020-10-26 19:19:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:11,695 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-26 19:19:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:19:11,698 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2020-10-26 19:19:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:11,699 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:19:11,699 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:19:11,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:19:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:19:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:19:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:19:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-26 19:19:11,703 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 77 [2020-10-26 19:19:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:11,703 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-26 19:19:11,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:19:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-26 19:19:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:19:11,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:11,704 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:11,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:19:11,705 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1019250800, now seen corresponding path program 29 times [2020-10-26 19:19:11,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:11,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586962439] [2020-10-26 19:19:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:19:16,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:17,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:17,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:17,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586962439] [2020-10-26 19:19:17,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:17,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:19:17,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737090440] [2020-10-26 19:19:17,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:19:17,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:19:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:19:17,335 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 33 states. [2020-10-26 19:19:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:17,637 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-26 19:19:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:19:17,637 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2020-10-26 19:19:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:17,638 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:19:17,638 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:19:17,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:19:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:19:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:19:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:19:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-26 19:19:17,644 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 79 [2020-10-26 19:19:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:17,644 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-26 19:19:17,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:19:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-26 19:19:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:19:17,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:17,645 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:17,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:19:17,645 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1275608978, now seen corresponding path program 30 times [2020-10-26 19:19:17,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:17,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990119880] [2020-10-26 19:19:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:22,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:19:22,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:23,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:23,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990119880] [2020-10-26 19:19:23,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:23,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:19:23,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763609452] [2020-10-26 19:19:23,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:19:23,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:23,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:19:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:19:23,308 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 34 states. [2020-10-26 19:19:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:23,613 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-26 19:19:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:19:23,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-10-26 19:19:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:23,615 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:19:23,615 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:19:23,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:19:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:19:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:19:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:19:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-26 19:19:23,621 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 81 [2020-10-26 19:19:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:23,621 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-26 19:19:23,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:19:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-26 19:19:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:19:23,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:23,623 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:23,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:19:23,623 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:23,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1472285132, now seen corresponding path program 31 times [2020-10-26 19:19:23,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:23,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523883659] [2020-10-26 19:19:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:19:28,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:29,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:29,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:29,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:29,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:29,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523883659] [2020-10-26 19:19:29,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:29,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:19:29,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834093253] [2020-10-26 19:19:29,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:19:29,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:19:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:19:29,328 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 35 states. [2020-10-26 19:19:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:29,536 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-26 19:19:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:19:29,537 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-10-26 19:19:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:29,538 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:19:29,538 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:19:29,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:19:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:19:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:19:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:19:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-26 19:19:29,543 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2020-10-26 19:19:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:29,544 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-26 19:19:29,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:19:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-26 19:19:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:19:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:29,545 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:29,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:19:29,545 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash 793637802, now seen corresponding path program 32 times [2020-10-26 19:19:29,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:29,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421255923] [2020-10-26 19:19:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:19:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:35,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:35,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:35,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:35,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:35,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:35,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:35,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:35,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:35,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421255923] [2020-10-26 19:19:35,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:35,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:19:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703787079] [2020-10-26 19:19:35,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:19:35,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:19:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:19:35,272 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 36 states. [2020-10-26 19:19:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:35,605 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-26 19:19:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:19:35,605 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2020-10-26 19:19:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:35,607 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:19:35,607 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:19:35,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:19:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:19:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:19:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:19:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-26 19:19:35,614 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 85 [2020-10-26 19:19:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:35,614 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-26 19:19:35,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:19:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-26 19:19:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:19:35,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:35,615 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:35,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:19:35,616 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1448582664, now seen corresponding path program 33 times [2020-10-26 19:19:35,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:35,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599269664] [2020-10-26 19:19:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:40,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:19:40,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:40,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:19:40,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:40,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:19:40,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:40,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:19:40,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:41,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599269664] [2020-10-26 19:19:41,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:41,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:19:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477283267] [2020-10-26 19:19:41,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:19:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:19:41,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:19:41,376 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 37 states. [2020-10-26 19:19:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:41,586 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-26 19:19:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:19:41,586 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 87 [2020-10-26 19:19:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:41,588 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:19:41,588 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:19:41,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:19:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:19:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:19:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:19:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-26 19:19:41,595 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 87 [2020-10-26 19:19:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:41,595 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-26 19:19:41,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:19:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-26 19:19:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:19:41,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:41,597 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:41,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:19:41,597 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash -509597466, now seen corresponding path program 34 times [2020-10-26 19:19:41,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:41,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470495793] [2020-10-26 19:19:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:41,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:19:46,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:47,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:47,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:47,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:47,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:47,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470495793] [2020-10-26 19:19:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:19:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158162640] [2020-10-26 19:19:47,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:19:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:19:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:19:47,425 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 38 states. [2020-10-26 19:19:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:47,757 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-26 19:19:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:19:47,757 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 89 [2020-10-26 19:19:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:47,758 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:19:47,758 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:19:47,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:19:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:19:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:19:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:19:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-26 19:19:47,764 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 89 [2020-10-26 19:19:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:47,765 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-26 19:19:47,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:19:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-26 19:19:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:19:47,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:47,766 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:47,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:19:47,766 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1125026748, now seen corresponding path program 35 times [2020-10-26 19:19:47,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:47,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756446230] [2020-10-26 19:19:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:47,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:19:52,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:53,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:53,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756446230] [2020-10-26 19:19:53,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:53,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:19:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960604090] [2020-10-26 19:19:53,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:19:53,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:19:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:19:53,653 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 39 states. [2020-10-26 19:19:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:53,961 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-26 19:19:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:19:53,961 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 91 [2020-10-26 19:19:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:53,963 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:19:53,963 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:19:53,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:19:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:19:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:19:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:19:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-26 19:19:53,970 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 91 [2020-10-26 19:19:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:53,970 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-26 19:19:53,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:19:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-26 19:19:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:19:53,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:53,971 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:53,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:19:53,971 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash 152920098, now seen corresponding path program 36 times [2020-10-26 19:19:53,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:53,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33146849] [2020-10-26 19:19:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:54,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:58,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:19:58,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:19:58,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:19:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:19:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:59,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:59,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33146849] [2020-10-26 19:19:59,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:59,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:19:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875523109] [2020-10-26 19:19:59,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:19:59,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:19:59,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:19:59,825 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 40 states. [2020-10-26 19:20:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:00,102 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-26 19:20:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:20:00,103 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2020-10-26 19:20:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:00,104 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:20:00,105 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:20:00,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:20:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:20:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:20:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:20:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-26 19:20:00,110 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 93 [2020-10-26 19:20:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:00,110 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-26 19:20:00,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:20:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-26 19:20:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:20:00,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:00,111 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:00,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:20:00,111 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash -100807552, now seen corresponding path program 37 times [2020-10-26 19:20:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:00,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971105833] [2020-10-26 19:20:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:05,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:20:05,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:06,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:06,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:06,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:06,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:06,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:06,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:06,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:06,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:06,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:06,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971105833] [2020-10-26 19:20:06,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:06,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:20:06,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692814637] [2020-10-26 19:20:06,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:20:06,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:20:06,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:20:06,065 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 41 states. [2020-10-26 19:20:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:06,346 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-26 19:20:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:20:06,346 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 95 [2020-10-26 19:20:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:06,347 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:20:06,348 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:20:06,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:20:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:20:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:20:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:20:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-26 19:20:06,354 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 95 [2020-10-26 19:20:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:06,354 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-26 19:20:06,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:20:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-26 19:20:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:20:06,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:06,355 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:06,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:20:06,355 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:06,356 INFO L82 PathProgramCache]: Analyzing trace with hash 880056670, now seen corresponding path program 38 times [2020-10-26 19:20:06,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:06,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121877431] [2020-10-26 19:20:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:11,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:20:11,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:11,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:20:11,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:11,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:20:11,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:11,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:20:11,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:12,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:12,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:12,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:12,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:12,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:12,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:12,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:12,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:12,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:12,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:12,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121877431] [2020-10-26 19:20:12,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:12,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:20:12,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569400631] [2020-10-26 19:20:12,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:20:12,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:20:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:20:12,360 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 42 states. [2020-10-26 19:20:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:12,627 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-26 19:20:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:20:12,628 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 97 [2020-10-26 19:20:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:12,629 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:20:12,629 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:20:12,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:20:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:20:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:20:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:20:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-26 19:20:12,635 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 97 [2020-10-26 19:20:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:12,635 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-26 19:20:12,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:20:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-26 19:20:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:20:12,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:12,636 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:12,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:20:12,636 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1402231108, now seen corresponding path program 39 times [2020-10-26 19:20:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:12,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721848612] [2020-10-26 19:20:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:12,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:17,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:17,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:20:17,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:17,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:20:17,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:20:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:20:17,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:18,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:18,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:18,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:18,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:18,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721848612] [2020-10-26 19:20:18,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:18,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:20:18,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913039447] [2020-10-26 19:20:18,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:20:18,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:20:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:20:18,713 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 43 states. [2020-10-26 19:20:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:19,057 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-26 19:20:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:20:19,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 99 [2020-10-26 19:20:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:19,059 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:20:19,059 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:20:19,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:20:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:20:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:20:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:20:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-26 19:20:19,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 99 [2020-10-26 19:20:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:19,066 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-26 19:20:19,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:20:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-26 19:20:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:20:19,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:19,067 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:19,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:20:19,068 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:19,068 INFO L82 PathProgramCache]: Analyzing trace with hash 47502490, now seen corresponding path program 40 times [2020-10-26 19:20:19,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:19,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300327815] [2020-10-26 19:20:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:20:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:24,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:20:24,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:25,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:25,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:25,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300327815] [2020-10-26 19:20:25,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:25,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:20:25,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205484799] [2020-10-26 19:20:25,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:20:25,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:20:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:20:25,183 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 44 states. [2020-10-26 19:20:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:25,556 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-26 19:20:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:20:25,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 101 [2020-10-26 19:20:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:25,558 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:20:25,558 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:20:25,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:20:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:20:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:20:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:20:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-26 19:20:25,564 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 101 [2020-10-26 19:20:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:25,564 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-26 19:20:25,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:20:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-26 19:20:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:20:25,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:25,565 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:25,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:20:25,565 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1672086264, now seen corresponding path program 41 times [2020-10-26 19:20:25,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:25,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816554176] [2020-10-26 19:20:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:30,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:20:30,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:31,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:31,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:31,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:31,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816554176] [2020-10-26 19:20:31,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:31,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:20:31,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743501766] [2020-10-26 19:20:31,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:20:31,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:20:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:20:31,752 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 45 states. [2020-10-26 19:20:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:31,990 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2020-10-26 19:20:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:20:31,991 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 103 [2020-10-26 19:20:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:31,993 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:20:31,993 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:20:31,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:20:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:20:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:20:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:20:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-26 19:20:31,999 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 103 [2020-10-26 19:20:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:31,999 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-26 19:20:31,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:20:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-26 19:20:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:20:32,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:32,000 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:32,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:20:32,001 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash -471002666, now seen corresponding path program 42 times [2020-10-26 19:20:32,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:32,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729356784] [2020-10-26 19:20:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:32,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:37,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:20:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:38,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:38,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729356784] [2020-10-26 19:20:38,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:38,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:20:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844298768] [2020-10-26 19:20:38,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:20:38,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:20:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:20:38,242 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 46 states. [2020-10-26 19:20:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:38,640 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-26 19:20:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:20:38,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 105 [2020-10-26 19:20:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:38,642 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:20:38,642 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:20:38,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:20:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:20:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:20:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:20:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-26 19:20:38,648 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 105 [2020-10-26 19:20:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:38,648 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-26 19:20:38,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:20:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-26 19:20:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:20:38,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:38,649 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:38,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:20:38,650 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1604837684, now seen corresponding path program 43 times [2020-10-26 19:20:38,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:38,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659465531] [2020-10-26 19:20:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:38,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:20:43,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:44,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:44,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:44,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:44,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:44,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659465531] [2020-10-26 19:20:44,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:44,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:20:44,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706118039] [2020-10-26 19:20:44,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:20:44,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:20:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:20:44,946 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 47 states. [2020-10-26 19:20:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:45,232 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-26 19:20:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:20:45,233 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 107 [2020-10-26 19:20:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:45,234 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:20:45,234 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:20:45,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:20:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:20:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:20:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:20:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-26 19:20:45,240 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 107 [2020-10-26 19:20:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:45,240 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-26 19:20:45,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:20:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-26 19:20:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:20:45,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:45,241 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:45,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:20:45,242 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:45,242 INFO L82 PathProgramCache]: Analyzing trace with hash -672378606, now seen corresponding path program 44 times [2020-10-26 19:20:45,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:45,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626199048] [2020-10-26 19:20:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:45,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:20:50,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:51,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:51,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:51,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:51,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626199048] [2020-10-26 19:20:51,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:51,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:20:51,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088871546] [2020-10-26 19:20:51,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:20:51,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:51,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:20:51,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:20:51,506 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 48 states. [2020-10-26 19:20:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:51,910 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2020-10-26 19:20:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:20:51,911 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 109 [2020-10-26 19:20:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:51,912 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:20:51,913 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:20:51,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:20:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:20:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:20:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:20:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-26 19:20:51,918 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 109 [2020-10-26 19:20:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:51,918 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-26 19:20:51,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:20:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-26 19:20:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:20:51,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:51,919 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:51,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:20:51,919 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1356087664, now seen corresponding path program 45 times [2020-10-26 19:20:51,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:51,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377284324] [2020-10-26 19:20:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:51,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:52,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:20:56,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:58,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:58,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:58,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:58,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:58,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:58,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377284324] [2020-10-26 19:20:58,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:58,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:20:58,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666106232] [2020-10-26 19:20:58,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:20:58,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:20:58,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:20:58,331 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 49 states. [2020-10-26 19:20:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:58,779 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2020-10-26 19:20:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:20:58,780 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 111 [2020-10-26 19:20:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:58,781 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:20:58,781 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:20:58,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:20:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:20:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:20:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:20:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-26 19:20:58,786 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 111 [2020-10-26 19:20:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:58,786 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-26 19:20:58,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:20:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-26 19:20:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:20:58,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:58,787 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:58,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:20:58,787 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash 797020750, now seen corresponding path program 46 times [2020-10-26 19:20:58,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:58,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135929275] [2020-10-26 19:20:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:58,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:03,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:21:03,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:05,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:05,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:05,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135929275] [2020-10-26 19:21:05,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:05,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:21:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552902397] [2020-10-26 19:21:05,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:21:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:21:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:21:05,240 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 50 states. [2020-10-26 19:21:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:05,691 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-10-26 19:21:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:21:05,692 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 113 [2020-10-26 19:21:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:05,694 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:21:05,694 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:21:05,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:21:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:21:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:21:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:21:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-26 19:21:05,700 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 113 [2020-10-26 19:21:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:05,700 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-26 19:21:05,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:21:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-26 19:21:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:21:05,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:05,701 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:05,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:21:05,701 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:05,702 INFO L82 PathProgramCache]: Analyzing trace with hash 404628396, now seen corresponding path program 47 times [2020-10-26 19:21:05,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:05,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967134295] [2020-10-26 19:21:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:05,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:05,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:05,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:10,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:21:10,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:10,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:21:10,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:21:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:21:10,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:12,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:12,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:12,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:12,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967134295] [2020-10-26 19:21:12,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:12,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:21:12,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821921793] [2020-10-26 19:21:12,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:21:12,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:21:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:21:12,217 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 51 states. [2020-10-26 19:21:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:12,689 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-10-26 19:21:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:21:12,690 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 115 [2020-10-26 19:21:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:12,692 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:21:12,692 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:21:12,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:21:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:21:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-26 19:21:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:21:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-10-26 19:21:12,698 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 115 [2020-10-26 19:21:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:12,698 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-10-26 19:21:12,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:21:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-10-26 19:21:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:21:12,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:12,699 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:12,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:21:12,700 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:12,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1272698250, now seen corresponding path program 48 times [2020-10-26 19:21:12,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:12,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779112630] [2020-10-26 19:21:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:17,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:21:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:19,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:19,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779112630] [2020-10-26 19:21:19,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:19,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:21:19,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010388152] [2020-10-26 19:21:19,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:21:19,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:21:19,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:21:19,290 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 52 states. [2020-10-26 19:21:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:19,753 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-10-26 19:21:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:21:19,753 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 117 [2020-10-26 19:21:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:19,754 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:21:19,754 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:21:19,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:21:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:21:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-26 19:21:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:21:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-26 19:21:19,760 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 117 [2020-10-26 19:21:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:19,760 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-26 19:21:19,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:21:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-26 19:21:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:21:19,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:19,761 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:19,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:21:19,761 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:19,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2030794776, now seen corresponding path program 49 times [2020-10-26 19:21:19,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:19,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064052725] [2020-10-26 19:21:19,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:19,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking...