/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_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:28,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:28,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:28,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:28,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:28,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:28,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:28,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:28,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:28,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:28,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:28,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:28,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:28,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:28,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:28,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:28,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:28,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:28,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:28,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:28,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:28,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:28,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:28,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:28,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:28,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:28,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:28,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:28,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:28,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:28,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:28,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:28,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:28,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:28,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:28,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:28,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:28,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:28,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:28,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:28,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:28,705 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 19:29:28,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:28,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:28,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:28,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:28,735 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:28,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:28,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:28,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:28,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:28,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:28,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:28,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:28,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:28,736 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:28,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:28,737 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:28,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:28,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:28,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:28,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:28,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:28,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:28,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:28,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:28,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:28,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:28,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:28,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:28,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:28,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:29,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:29,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:29,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:29,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:29,158 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:29,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2020-10-26 19:29:29,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cb64678a/d34fa6eeca7f4dad8d1897fa4b017644/FLAG456fabfdf [2020-10-26 19:29:29,962 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:29,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2020-10-26 19:29:29,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cb64678a/d34fa6eeca7f4dad8d1897fa4b017644/FLAG456fabfdf [2020-10-26 19:29:30,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cb64678a/d34fa6eeca7f4dad8d1897fa4b017644 [2020-10-26 19:29:30,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:30,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:30,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:30,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:30,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:30,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a2d075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30, skipping insertion in model container [2020-10-26 19:29:30,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:30,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:30,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:30,627 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:30,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:30,688 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:30,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30 WrapperNode [2020-10-26 19:29:30,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:30,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:30,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:30,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:30,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (1/1) ... [2020-10-26 19:29:30,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:30,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:30,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:30,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:30,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (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 19:29:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:30,849 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:30,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:30,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:31,186 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:31,186 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:29:31,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:31 BoogieIcfgContainer [2020-10-26 19:29:31,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:31,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:31,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:31,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:31,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:30" (1/3) ... [2020-10-26 19:29:31,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32dd729e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:31, skipping insertion in model container [2020-10-26 19:29:31,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:30" (2/3) ... [2020-10-26 19:29:31,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32dd729e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:31, skipping insertion in model container [2020-10-26 19:29:31,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:31" (3/3) ... [2020-10-26 19:29:31,206 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2020-10-26 19:29:31,223 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:31,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:31,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:31,311 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:31,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:31,311 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:31,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:31,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:31,312 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:31,312 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:31,314 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-26 19:29:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:31,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:31,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:31,384 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-26 19:29:31,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:31,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003225557] [2020-10-26 19:29:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:31,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:31,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:31,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-26 19:29:31,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:29:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:31,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:29:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:31,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:29:31,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,002 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 19:29:32,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003225557] [2020-10-26 19:29:32,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:32,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:29:32,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797619682] [2020-10-26 19:29:32,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:29:32,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:29:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:29:32,030 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-26 19:29:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:32,128 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-26 19:29:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:29:32,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:29:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:32,138 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:29:32,138 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 19:29:32,142 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 19:29:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 19:29:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 19:29:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:29:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:29:32,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-26 19:29:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:32,190 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:29:32,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:29:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:29:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:32,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:32,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:32,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:32,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-26 19:29:32,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:32,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560483497] [2020-10-26 19:29:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:32,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:32,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:32,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 19:29:32,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:29:32,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:32,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:32,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:32,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:29:32,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:32,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:32,470 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 19:29:32,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560483497] [2020-10-26 19:29:32,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:32,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:29:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086779087] [2020-10-26 19:29:32,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:29:32,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:29:32,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:32,476 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-26 19:29:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:32,570 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-26 19:29:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:29:32,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:29:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:32,572 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:29:32,572 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:29:32,573 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 19:29:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:29:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-26 19:29:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:29:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-26 19:29:32,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2020-10-26 19:29:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:32,584 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-26 19:29:32,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:29:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-26 19:29:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:29:32,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:32,586 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 19:29:32,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:32,586 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash -999640386, now seen corresponding path program 1 times [2020-10-26 19:29:32,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:32,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073267758] [2020-10-26 19:29:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:33,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:33,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:29:33,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-26 19:29:33,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:29:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:33,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:33,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:33,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:33,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:33,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:33,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:33,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:33,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:33,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073267758] [2020-10-26 19:29:33,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:33,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:33,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118763061] [2020-10-26 19:29:33,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:33,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:33,491 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-26 19:29:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:33,583 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-26 19:29:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:33,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-26 19:29:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:33,585 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:29:33,586 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:29:33,586 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 19:29:33,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:29:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:29:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:29:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 19:29:33,595 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-26 19:29:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:33,595 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 19:29:33,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 19:29:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:29:33,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:33,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:33,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:33,597 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1354504774, now seen corresponding path program 2 times [2020-10-26 19:29:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:33,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994764308] [2020-10-26 19:29:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:33,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:33,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:29:34,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-26 19:29:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:34,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:35,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:35,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:35,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:35,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:35,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:35,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:29:35,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994764308] [2020-10-26 19:29:35,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:35,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:35,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308259469] [2020-10-26 19:29:35,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:35,017 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-26 19:29:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:35,124 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-26 19:29:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:35,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-26 19:29:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:35,125 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:29:35,125 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:29:35,126 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 19:29:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:29:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:29:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:29:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:29:35,134 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-26 19:29:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:35,134 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:29:35,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:29:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:29:35,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:35,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:35,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:35,136 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1478765238, now seen corresponding path program 3 times [2020-10-26 19:29:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:35,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071524787] [2020-10-26 19:29:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:38,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:29:38,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3095 [2020-10-26 19:29:38,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:29:38,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:38,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:38,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:38,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:38,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:38,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:38,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:38,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:29:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071524787] [2020-10-26 19:29:38,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:38,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:38,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396208059] [2020-10-26 19:29:38,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:38,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:38,366 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-10-26 19:29:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:38,501 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-26 19:29:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:38,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-26 19:29:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:38,502 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:29:38,502 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:29:38,503 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 19:29:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:29:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:29:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:29:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-26 19:29:38,516 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2020-10-26 19:29:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:38,517 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-26 19:29:38,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-26 19:29:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:29:38,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:38,519 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:38,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:38,519 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1598651982, now seen corresponding path program 4 times [2020-10-26 19:29:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:38,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410238543] [2020-10-26 19:29:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:43,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:29:43,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4501 [2020-10-26 19:29:43,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:29:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:29:43,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:43,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:43,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:43,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:43,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:43,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:29:43,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410238543] [2020-10-26 19:29:43,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:43,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:29:43,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353185513] [2020-10-26 19:29:43,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:29:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:29:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:43,158 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-26 19:29:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:43,295 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-26 19:29:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:43,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:29:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:43,300 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:29:43,303 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:29:43,304 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 19:29:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:29:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:29:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:29:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-26 19:29:43,315 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-10-26 19:29:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:43,315 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-26 19:29:43,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:29:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-26 19:29:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:29:43,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:43,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:43,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:43,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash -869930322, now seen corresponding path program 5 times [2020-10-26 19:29:43,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:43,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706200770] [2020-10-26 19:29:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:48,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:29:48,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:29:48,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:29:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:29:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:48,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:48,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:48,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:48,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:48,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:48,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:48,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:29:48,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706200770] [2020-10-26 19:29:48,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:48,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:29:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794499442] [2020-10-26 19:29:48,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:29:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:29:48,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:48,456 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2020-10-26 19:29:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:48,602 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-26 19:29:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:29:48,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-26 19:29:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:48,604 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:29:48,604 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:29:48,605 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 19:29:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:29:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:29:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:29:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-26 19:29:48,612 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-10-26 19:29:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:48,612 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-26 19:29:48,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:29:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-26 19:29:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:29:48,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:48,614 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:48,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:48,614 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash -14850646, now seen corresponding path program 6 times [2020-10-26 19:29:48,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:48,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849060011] [2020-10-26 19:29:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:48,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:53,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:53,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:29:53,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:53,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:29:53,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:29:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:53,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:53,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:53,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:53,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:53,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:53,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:53,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:53,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:29:53,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849060011] [2020-10-26 19:29:53,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:53,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:29:53,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939113684] [2020-10-26 19:29:53,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:29:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:29:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:53,746 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 10 states. [2020-10-26 19:29:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:53,912 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-26 19:29:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:29:53,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-26 19:29:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:53,914 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:29:53,914 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:29:53,915 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 19:29:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:29:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:29:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:29:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-26 19:29:53,929 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-26 19:29:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:53,929 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-26 19:29:53,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:29:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-26 19:29:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:29:53,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:53,934 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:53,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:29:53,934 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1077415258, now seen corresponding path program 7 times [2020-10-26 19:29:53,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:53,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687148332] [2020-10-26 19:29:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:53,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:58,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:58,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:29:58,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:29:58,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:29:58,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:59,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:59,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:59,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:59,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:59,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:59,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:59,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:59,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:59,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:59,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:59,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:29:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687148332] [2020-10-26 19:29:59,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:59,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:59,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550241610] [2020-10-26 19:29:59,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:59,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:59,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:59,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:59,077 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 11 states. [2020-10-26 19:29:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:59,209 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-26 19:29:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:59,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-26 19:29:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:59,211 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:29:59,211 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:29:59,212 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 19:29:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:29:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:29:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:29:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-26 19:29:59,225 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2020-10-26 19:29:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:59,226 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-26 19:29:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-26 19:29:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:29:59,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:59,229 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:59,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:29:59,229 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1976603042, now seen corresponding path program 8 times [2020-10-26 19:29:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:59,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770525113] [2020-10-26 19:29:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:59,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:59,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:04,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:30:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:30:04,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:30:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:30:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:04,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:04,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:04,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:04,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:04,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:04,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:04,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-26 19:30:04,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770525113] [2020-10-26 19:30:04,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:04,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:30:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316927572] [2020-10-26 19:30:04,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:30:04,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:30:04,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:30:04,399 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 12 states. [2020-10-26 19:30:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:04,547 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-26 19:30:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:30:04,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-26 19:30:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:04,549 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:30:04,549 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:30:04,551 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 19:30:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:30:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:30:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:30:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-26 19:30:04,566 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-26 19:30:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:04,566 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-26 19:30:04,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:30:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-26 19:30:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:30:04,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:04,567 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:04,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:30:04,568 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash -362659170, now seen corresponding path program 9 times [2020-10-26 19:30:04,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:04,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678325429] [2020-10-26 19:30:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:04,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:09,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:09,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:30:09,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:09,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:30:09,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:30:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:30:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:09,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:09,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:09,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:09,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:09,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:09,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:09,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:09,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:09,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:09,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:09,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:30:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678325429] [2020-10-26 19:30:09,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:09,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:30:09,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963333198] [2020-10-26 19:30:09,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:30:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:30:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:09,771 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 13 states. [2020-10-26 19:30:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:09,964 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-26 19:30:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:30:09,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-26 19:30:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:09,966 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:30:09,966 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:30:09,967 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 19:30:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:30:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:30:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:30:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-26 19:30:09,973 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-26 19:30:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:09,974 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-26 19:30:09,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:30:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-26 19:30:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:30:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:09,975 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:09,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:30:09,975 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash -936901222, now seen corresponding path program 10 times [2020-10-26 19:30:09,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:09,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396569811] [2020-10-26 19:30:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:09,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:10,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:12,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:30:14,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:30:15,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:30:15,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:15,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:30:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:15,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:15,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:15,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:15,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:15,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 19:30:15,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396569811] [2020-10-26 19:30:15,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:15,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:30:15,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073322907] [2020-10-26 19:30:15,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:30:15,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:30:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:15,193 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 14 states. [2020-10-26 19:30:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:15,423 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-26 19:30:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:30:15,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-26 19:30:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:15,425 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:30:15,425 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:30:15,426 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 19:30:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:30:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:30:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:30:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-26 19:30:15,435 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 57 [2020-10-26 19:30:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:15,435 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-26 19:30:15,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:30:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-26 19:30:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:30:15,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:15,436 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:15,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:30:15,436 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash 458021526, now seen corresponding path program 11 times [2020-10-26 19:30:15,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:15,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108452161] [2020-10-26 19:30:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:20,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:30:20,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:20,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:30:20,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:20,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:30:20,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:20,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:30:20,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:20,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-26 19:30:20,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108452161] [2020-10-26 19:30:20,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:20,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:30:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895002379] [2020-10-26 19:30:20,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:30:20,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:30:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:20,661 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2020-10-26 19:30:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:20,912 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-26 19:30:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:30:20,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-26 19:30:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:20,913 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:30:20,914 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:30:20,914 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 19:30:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:30:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:30:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:30:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-26 19:30:20,921 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-10-26 19:30:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:20,921 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-26 19:30:20,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:30:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-26 19:30:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:30:20,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:20,923 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:20,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:30:20,923 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:20,923 INFO L82 PathProgramCache]: Analyzing trace with hash -780418670, now seen corresponding path program 12 times [2020-10-26 19:30:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:20,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292135347] [2020-10-26 19:30:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:25,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:30:25,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:30:25,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:30:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:26,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:26,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:26,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:26,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:30:26,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:26,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 19:30:26,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292135347] [2020-10-26 19:30:26,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:26,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:26,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046231170] [2020-10-26 19:30:26,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:26,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:26,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:26,203 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 16 states. [2020-10-26 19:30:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:26,515 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-26 19:30:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:30:26,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-26 19:30:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:26,517 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:30:26,517 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:30:26,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:30:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:30:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:30:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-26 19:30:26,524 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 65 [2020-10-26 19:30:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:26,525 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-26 19:30:26,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-26 19:30:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:30:26,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:26,526 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:26,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:30:26,526 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash 970963598, now seen corresponding path program 13 times [2020-10-26 19:30:26,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:26,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29948394] [2020-10-26 19:30:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:31,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:30:31,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:30:31,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:30:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:31,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:31,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:31,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:31,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:31,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-26 19:30:31,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29948394] [2020-10-26 19:30:31,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:31,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:30:31,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898103201] [2020-10-26 19:30:31,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:30:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:30:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:31,815 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 17 states. [2020-10-26 19:30:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:32,060 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-10-26 19:30:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:30:32,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-26 19:30:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:32,062 INFO L225 Difference]: With dead ends: 121 [2020-10-26 19:30:32,062 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:30:32,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:30:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:30:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:30:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-26 19:30:32,076 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-10-26 19:30:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:32,076 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-26 19:30:32,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:30:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-26 19:30:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:30:32,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:32,085 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:32,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:30:32,089 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2061253238, now seen corresponding path program 14 times [2020-10-26 19:30:32,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:32,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365411833] [2020-10-26 19:30:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:32,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:30:37,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:37,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:37,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-26 19:30:37,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365411833] [2020-10-26 19:30:37,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:37,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:30:37,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452968497] [2020-10-26 19:30:37,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:30:37,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:37,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:30:37,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:37,389 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 18 states. [2020-10-26 19:30:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:37,628 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-26 19:30:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:30:37,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-26 19:30:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:37,629 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:30:37,629 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:30:37,630 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 19:30:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:30:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:30:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:30:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:30:37,643 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 73 [2020-10-26 19:30:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:37,643 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:30:37,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:30:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:30:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:30:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:37,644 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:37,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:37,645 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1165156998, now seen corresponding path program 15 times [2020-10-26 19:30:37,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:37,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733692432] [2020-10-26 19:30:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:30:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:42,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:42,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:42,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:42,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:42,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:42,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:30:42,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733692432] [2020-10-26 19:30:42,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:42,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:42,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300137613] [2020-10-26 19:30:42,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:42,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:42,962 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-10-26 19:30:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:43,211 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-26 19:30:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:30:43,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-10-26 19:30:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:43,212 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:30:43,212 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:30:43,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:30:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:30:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:30:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-26 19:30:43,221 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2020-10-26 19:30:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:43,221 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-26 19:30:43,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-26 19:30:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:30:43,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:43,222 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:43,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:30:43,223 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:43,223 INFO L82 PathProgramCache]: Analyzing trace with hash -294121086, now seen corresponding path program 16 times [2020-10-26 19:30:43,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:43,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073209410] [2020-10-26 19:30:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:48,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:30:48,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:30:48,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:30:48,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:48,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:30:48,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:48,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:48,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:48,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:48,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:48,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:48,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:48,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:48,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:48,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-26 19:30:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073209410] [2020-10-26 19:30:48,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:48,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:30:48,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99282457] [2020-10-26 19:30:48,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:30:48,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:48,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:30:48,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:48,567 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 20 states. [2020-10-26 19:30:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:48,830 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-10-26 19:30:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:30:48,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-26 19:30:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:48,831 INFO L225 Difference]: With dead ends: 139 [2020-10-26 19:30:48,832 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:30:48,833 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 19:30:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:30:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:30:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:30:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-26 19:30:48,845 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 81 [2020-10-26 19:30:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:48,845 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-26 19:30:48,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:30:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-26 19:30:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:30:48,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:48,846 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:48,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:30:48,846 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1432244862, now seen corresponding path program 17 times [2020-10-26 19:30:48,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:48,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697394353] [2020-10-26 19:30:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:48,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:30:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:54,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-26 19:30:54,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697394353] [2020-10-26 19:30:54,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:54,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:30:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905887018] [2020-10-26 19:30:54,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:30:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:30:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:54,199 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 21 states. [2020-10-26 19:30:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:54,511 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-26 19:30:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:30:54,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-26 19:30:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:54,513 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:30:54,514 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:30:54,515 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 19:30:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:30:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:30:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:30:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-26 19:30:54,521 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 85 [2020-10-26 19:30:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:54,521 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-26 19:30:54,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:30:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-26 19:30:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:30:54,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:54,522 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:54,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:30:54,523 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash 818980218, now seen corresponding path program 18 times [2020-10-26 19:30:54,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:54,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602567648] [2020-10-26 19:30:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:30:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:59,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:59,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:59,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:59,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:59,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:59,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:59,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:59,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-26 19:30:59,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602567648] [2020-10-26 19:30:59,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:59,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:30:59,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773180139] [2020-10-26 19:30:59,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:30:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:30:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:59,933 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 22 states. [2020-10-26 19:31:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:00,274 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2020-10-26 19:31:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:31:00,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2020-10-26 19:31:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:00,276 INFO L225 Difference]: With dead ends: 151 [2020-10-26 19:31:00,276 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:31:00,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:31:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:31:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:31:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:31:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-26 19:31:00,282 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 89 [2020-10-26 19:31:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:00,282 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-26 19:31:00,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:31:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-26 19:31:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:31:00,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:00,284 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:00,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:31:00,284 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1728443786, now seen corresponding path program 19 times [2020-10-26 19:31:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:00,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047323878] [2020-10-26 19:31:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:00,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:31:05,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:31:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:05,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:05,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:05,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-26 19:31:05,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047323878] [2020-10-26 19:31:05,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:05,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:31:05,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571684425] [2020-10-26 19:31:05,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:31:05,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:31:05,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:31:05,695 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 23 states. [2020-10-26 19:31:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:06,043 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2020-10-26 19:31:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:31:06,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-10-26 19:31:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:06,045 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:31:06,045 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:31:06,046 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 19:31:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:31:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:31:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:31:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-26 19:31:06,052 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 93 [2020-10-26 19:31:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:06,052 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-26 19:31:06,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:31:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-26 19:31:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:31:06,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:06,053 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:06,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:31:06,054 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2021293710, now seen corresponding path program 20 times [2020-10-26 19:31:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:06,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811468927] [2020-10-26 19:31:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:06,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:11,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:11,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:31:11,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:11,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:11,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:11,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-26 19:31:11,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811468927] [2020-10-26 19:31:11,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:11,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:31:11,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194952171] [2020-10-26 19:31:11,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:31:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:31:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:11,493 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 24 states. [2020-10-26 19:31:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:11,858 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2020-10-26 19:31:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:31:11,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-26 19:31:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:11,860 INFO L225 Difference]: With dead ends: 163 [2020-10-26 19:31:11,860 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:31:11,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:31:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:31:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:31:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-26 19:31:11,868 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 97 [2020-10-26 19:31:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:11,869 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-26 19:31:11,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:31:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-26 19:31:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:31:11,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:11,872 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:11,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:31:11,872 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1469975150, now seen corresponding path program 21 times [2020-10-26 19:31:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:11,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375917899] [2020-10-26 19:31:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:16,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:31:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:17,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:17,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:17,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:17,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-26 19:31:17,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375917899] [2020-10-26 19:31:17,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:17,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:31:17,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704555962] [2020-10-26 19:31:17,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:31:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:31:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:31:17,379 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 25 states. [2020-10-26 19:31:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:17,683 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2020-10-26 19:31:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:31:17,684 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2020-10-26 19:31:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:17,685 INFO L225 Difference]: With dead ends: 169 [2020-10-26 19:31:17,685 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:31:17,687 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 19:31:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:31:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:31:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:31:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-26 19:31:17,697 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 101 [2020-10-26 19:31:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:17,697 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-26 19:31:17,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:31:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-26 19:31:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:31:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:17,701 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:17,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:31:17,702 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:17,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1173267818, now seen corresponding path program 22 times [2020-10-26 19:31:17,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:17,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119682290] [2020-10-26 19:31:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:17,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:17,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:22,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:22,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:31:22,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:31:22,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:31:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:31:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:23,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:23,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-26 19:31:23,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119682290] [2020-10-26 19:31:23,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:23,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:31:23,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596796591] [2020-10-26 19:31:23,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:31:23,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:31:23,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:23,246 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 26 states. [2020-10-26 19:31:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:23,555 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2020-10-26 19:31:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:31:23,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 105 [2020-10-26 19:31:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:23,557 INFO L225 Difference]: With dead ends: 175 [2020-10-26 19:31:23,557 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:31:23,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:31:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:31:23,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:31:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-26 19:31:23,565 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 105 [2020-10-26 19:31:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:23,565 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-26 19:31:23,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:31:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-26 19:31:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:31:23,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:23,566 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:23,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:31:23,567 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash -257797530, now seen corresponding path program 23 times [2020-10-26 19:31:23,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:23,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323667301] [2020-10-26 19:31:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:28,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:31:28,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:29,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:29,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:29,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-26 19:31:29,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323667301] [2020-10-26 19:31:29,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:29,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:31:29,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746671107] [2020-10-26 19:31:29,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:31:29,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:31:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:29,189 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 27 states. [2020-10-26 19:31:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:29,624 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2020-10-26 19:31:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:31:29,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-26 19:31:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:29,626 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:31:29,626 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:31:29,627 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 19:31:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:31:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:31:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:31:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-26 19:31:29,633 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 109 [2020-10-26 19:31:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:29,633 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-26 19:31:29,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:31:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-26 19:31:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:31:29,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:29,635 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:29,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:31:29,635 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash -681307806, now seen corresponding path program 24 times [2020-10-26 19:31:29,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:29,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365012244] [2020-10-26 19:31:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:34,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:34,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:31:34,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:34,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:31:34,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:31:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:31:34,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:35,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:35,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:35,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:35,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:31:35,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:35,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:35,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-26 19:31:35,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365012244] [2020-10-26 19:31:35,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:35,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:31:35,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877370898] [2020-10-26 19:31:35,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:31:35,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:31:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:35,260 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 28 states. [2020-10-26 19:31:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:35,599 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2020-10-26 19:31:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:31:35,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 113 [2020-10-26 19:31:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:35,601 INFO L225 Difference]: With dead ends: 187 [2020-10-26 19:31:35,601 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:31:35,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:31:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:31:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:31:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-26 19:31:35,607 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 113 [2020-10-26 19:31:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:35,608 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-26 19:31:35,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:31:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-26 19:31:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:31:35,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:35,609 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:35,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:31:35,610 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash -614538658, now seen corresponding path program 25 times [2020-10-26 19:31:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:35,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307456985] [2020-10-26 19:31:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:31:40,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:41,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:41,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:41,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:31:41,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:41,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-26 19:31:41,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307456985] [2020-10-26 19:31:41,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:41,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:31:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204594812] [2020-10-26 19:31:41,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:31:41,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:31:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:41,244 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 29 states. [2020-10-26 19:31:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:41,668 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2020-10-26 19:31:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:31:41,669 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 117 [2020-10-26 19:31:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:41,671 INFO L225 Difference]: With dead ends: 193 [2020-10-26 19:31:41,671 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:31:41,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:31:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:31:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:31:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-26 19:31:41,685 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 117 [2020-10-26 19:31:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:41,690 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-26 19:31:41,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:31:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-26 19:31:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:31:41,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:41,693 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:41,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:31:41,693 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1086470822, now seen corresponding path program 26 times [2020-10-26 19:31:41,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:41,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467348827] [2020-10-26 19:31:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:31:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:47,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:47,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:47,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:47,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:47,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:47,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:47,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:47,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-26 19:31:47,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467348827] [2020-10-26 19:31:47,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:47,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:31:47,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073989784] [2020-10-26 19:31:47,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:31:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:31:47,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:47,401 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 30 states. [2020-10-26 19:31:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:47,829 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2020-10-26 19:31:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:31:47,830 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2020-10-26 19:31:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:47,832 INFO L225 Difference]: With dead ends: 199 [2020-10-26 19:31:47,832 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:31:47,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:31:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:31:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:31:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-26 19:31:47,840 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 121 [2020-10-26 19:31:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:47,840 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-26 19:31:47,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:31:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-26 19:31:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:31:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:47,841 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:47,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:31:47,842 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1490306474, now seen corresponding path program 27 times [2020-10-26 19:31:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:47,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793952098] [2020-10-26 19:31:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:47,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:31:52,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-26 19:31:53,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793952098] [2020-10-26 19:31:53,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:53,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:31:53,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079602911] [2020-10-26 19:31:53,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:31:53,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:53,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:31:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:31:53,587 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 31 states. [2020-10-26 19:31:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:53,983 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2020-10-26 19:31:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:31:53,983 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-26 19:31:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:53,985 INFO L225 Difference]: With dead ends: 205 [2020-10-26 19:31:53,985 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:31:53,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:31:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:31:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:31:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:31:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-26 19:31:53,993 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2020-10-26 19:31:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:53,993 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-26 19:31:53,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:31:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-26 19:31:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 19:31:53,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:53,995 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:53,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:31:53,995 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1730952878, now seen corresponding path program 28 times [2020-10-26 19:31:53,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:53,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161462432] [2020-10-26 19:31:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:58,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:59,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:31:59,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:59,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:59,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:59,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:59,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:59,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:59,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:59,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:59,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:59,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:59,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-26 19:31:59,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161462432] [2020-10-26 19:31:59,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:59,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:31:59,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687995163] [2020-10-26 19:31:59,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:31:59,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:31:59,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:31:59,750 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 32 states. [2020-10-26 19:32:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:00,246 INFO L93 Difference]: Finished difference Result 211 states and 216 transitions. [2020-10-26 19:32:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:32:00,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 129 [2020-10-26 19:32:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:00,248 INFO L225 Difference]: With dead ends: 211 [2020-10-26 19:32:00,248 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:32:00,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:32:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:32:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:32:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:32:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-26 19:32:00,256 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 129 [2020-10-26 19:32:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:00,256 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-26 19:32:00,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:32:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-26 19:32:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:32:00,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:00,258 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:00,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:32:00,258 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash -77538738, now seen corresponding path program 29 times [2020-10-26 19:32:00,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:00,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636457178] [2020-10-26 19:32:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:00,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:05,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:32:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:06,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:06,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:06,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:06,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-26 19:32:06,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636457178] [2020-10-26 19:32:06,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:06,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:32:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096258160] [2020-10-26 19:32:06,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:32:06,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:32:06,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:32:06,131 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 33 states. [2020-10-26 19:32:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:06,589 INFO L93 Difference]: Finished difference Result 217 states and 222 transitions. [2020-10-26 19:32:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:32:06,589 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 133 [2020-10-26 19:32:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:06,591 INFO L225 Difference]: With dead ends: 217 [2020-10-26 19:32:06,591 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:32:06,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:32:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:32:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-26 19:32:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:32:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-26 19:32:06,599 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 133 [2020-10-26 19:32:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:06,599 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-26 19:32:06,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:32:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-26 19:32:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:32:06,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:06,600 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:06,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:32:06,603 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash 394134858, now seen corresponding path program 30 times [2020-10-26 19:32:06,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728247667] [2020-10-26 19:32:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:06,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:11,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:32:11,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:11,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-26 19:32:11,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:32:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:32:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:12,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:12,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:12,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:12,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:12,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:12,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:12,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-26 19:32:12,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728247667] [2020-10-26 19:32:12,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:12,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:32:12,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125981790] [2020-10-26 19:32:12,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:32:12,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:32:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:32:12,492 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 34 states. [2020-10-26 19:32:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:12,939 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2020-10-26 19:32:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:32:12,945 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 137 [2020-10-26 19:32:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:12,946 INFO L225 Difference]: With dead ends: 223 [2020-10-26 19:32:12,946 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:32:12,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:32:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:32:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-26 19:32:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:32:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-26 19:32:12,954 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 137 [2020-10-26 19:32:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:12,954 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-26 19:32:12,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:32:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-26 19:32:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 19:32:12,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:12,955 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:12,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:32:12,956 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1755954618, now seen corresponding path program 31 times [2020-10-26 19:32:12,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:12,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375200031] [2020-10-26 19:32:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:13,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:15,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:18,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 19:32:18,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:18,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-26 19:32:18,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:32:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:32:18,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:18,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:18,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:18,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:18,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:18,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:18,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:18,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:18,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-26 19:32:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375200031] [2020-10-26 19:32:18,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:18,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:32:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461265405] [2020-10-26 19:32:18,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:32:18,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:18,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:32:18,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:32:18,964 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 35 states. [2020-10-26 19:32:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:19,511 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2020-10-26 19:32:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:32:19,511 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 141 [2020-10-26 19:32:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:19,513 INFO L225 Difference]: With dead ends: 229 [2020-10-26 19:32:19,513 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:32:19,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:32:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:32:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-26 19:32:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:32:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-26 19:32:19,522 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 141 [2020-10-26 19:32:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:19,522 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-26 19:32:19,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:32:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-26 19:32:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 19:32:19,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:19,523 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:19,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:32:19,523 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:19,524 INFO L82 PathProgramCache]: Analyzing trace with hash 110399810, now seen corresponding path program 32 times [2020-10-26 19:32:19,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:19,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605784401] [2020-10-26 19:32:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:22,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:32:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:25,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:25,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-26 19:32:25,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605784401] [2020-10-26 19:32:25,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:25,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:32:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390871786] [2020-10-26 19:32:25,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:32:25,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:32:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:25,501 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 36 states. [2020-10-26 19:32:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:26,052 INFO L93 Difference]: Finished difference Result 235 states and 240 transitions. [2020-10-26 19:32:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:32:26,053 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2020-10-26 19:32:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:26,054 INFO L225 Difference]: With dead ends: 235 [2020-10-26 19:32:26,054 INFO L226 Difference]: Without dead ends: 156 [2020-10-26 19:32:26,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-26 19:32:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-26 19:32:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:32:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-26 19:32:26,063 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 145 [2020-10-26 19:32:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:26,063 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-26 19:32:26,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:32:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-26 19:32:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 19:32:26,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:26,065 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:26,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:32:26,065 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1382281790, now seen corresponding path program 33 times [2020-10-26 19:32:26,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:26,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677225890] [2020-10-26 19:32:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:31,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:31,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:32:31,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:31,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-26 19:32:31,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:32:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:32:31,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:32,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:32,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:32,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-26 19:32:32,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677225890] [2020-10-26 19:32:32,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:32,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:32:32,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130363575] [2020-10-26 19:32:32,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:32:32,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:32,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:32:32,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:32,148 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 37 states. [2020-10-26 19:32:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:32,723 INFO L93 Difference]: Finished difference Result 241 states and 246 transitions. [2020-10-26 19:32:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:32:32,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 149 [2020-10-26 19:32:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:32,725 INFO L225 Difference]: With dead ends: 241 [2020-10-26 19:32:32,725 INFO L226 Difference]: Without dead ends: 160 [2020-10-26 19:32:32,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-26 19:32:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-26 19:32:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:32:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-26 19:32:32,733 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 149 [2020-10-26 19:32:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:32,734 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-26 19:32:32,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:32:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-26 19:32:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:32:32,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:32,735 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:32,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:32:32,735 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1232037178, now seen corresponding path program 34 times [2020-10-26 19:32:32,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:32,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099255150] [2020-10-26 19:32:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:36,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:37,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:37,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:32:37,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:37,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 19:32:37,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:32:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:32:37,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:38,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:38,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:38,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-26 19:32:38,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099255150] [2020-10-26 19:32:38,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:38,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:32:38,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656351360] [2020-10-26 19:32:38,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:32:38,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:32:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:38,845 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 38 states. [2020-10-26 19:32:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:39,458 INFO L93 Difference]: Finished difference Result 247 states and 252 transitions. [2020-10-26 19:32:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:32:39,458 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 153 [2020-10-26 19:32:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:39,460 INFO L225 Difference]: With dead ends: 247 [2020-10-26 19:32:39,460 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:32:39,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:32:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-26 19:32:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:32:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-10-26 19:32:39,469 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 153 [2020-10-26 19:32:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:39,469 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-10-26 19:32:39,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:32:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-10-26 19:32:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:32:39,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:39,470 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:39,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:32:39,470 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash 467790390, now seen corresponding path program 35 times [2020-10-26 19:32:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:39,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712587669] [2020-10-26 19:32:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:44,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:32:44,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:45,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:45,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:45,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:45,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-26 19:32:45,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712587669] [2020-10-26 19:32:45,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:45,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:32:45,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812904038] [2020-10-26 19:32:45,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:32:45,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:32:45,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:45,679 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 39 states. [2020-10-26 19:32:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:46,321 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2020-10-26 19:32:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:32:46,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 157 [2020-10-26 19:32:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:46,323 INFO L225 Difference]: With dead ends: 253 [2020-10-26 19:32:46,323 INFO L226 Difference]: Without dead ends: 168 [2020-10-26 19:32:46,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-26 19:32:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-26 19:32:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:32:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-26 19:32:46,331 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 157 [2020-10-26 19:32:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-26 19:32:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:32:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-26 19:32:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-26 19:32:46,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:46,332 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:46,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:32:46,333 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash -614039246, now seen corresponding path program 36 times [2020-10-26 19:32:46,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:46,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329638762] [2020-10-26 19:32:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:46,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:50,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:32:51,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:52,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:52,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:52,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:52,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:52,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:52,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-26 19:32:52,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329638762] [2020-10-26 19:32:52,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:52,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:32:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668889612] [2020-10-26 19:32:52,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:32:52,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:32:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:52,574 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 40 states. [2020-10-26 19:32:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:53,065 INFO L93 Difference]: Finished difference Result 259 states and 264 transitions. [2020-10-26 19:32:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:32:53,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 161 [2020-10-26 19:32:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:53,068 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:32:53,068 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:32:53,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:32:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2020-10-26 19:32:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:32:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-10-26 19:32:53,075 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 161 [2020-10-26 19:32:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:53,076 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-10-26 19:32:53,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:32:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-10-26 19:32:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-26 19:32:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:53,077 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:53,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:32:53,077 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -81253842, now seen corresponding path program 37 times [2020-10-26 19:32:53,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:53,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586240891] [2020-10-26 19:32:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:53,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:32:58,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-26 19:32:59,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586240891] [2020-10-26 19:32:59,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:59,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:32:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637480359] [2020-10-26 19:32:59,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:32:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:32:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:32:59,278 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 41 states. [2020-10-26 19:32:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:59,912 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2020-10-26 19:32:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:32:59,912 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 165 [2020-10-26 19:32:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:59,914 INFO L225 Difference]: With dead ends: 265 [2020-10-26 19:32:59,914 INFO L226 Difference]: Without dead ends: 176 [2020-10-26 19:32:59,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:32:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-26 19:32:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-10-26 19:32:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:32:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-26 19:32:59,923 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 165 [2020-10-26 19:32:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:59,924 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-26 19:32:59,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:32:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-26 19:32:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-26 19:32:59,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:59,925 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:59,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:32:59,926 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash -808327894, now seen corresponding path program 38 times [2020-10-26 19:32:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:59,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732310490] [2020-10-26 19:32:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:05,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:05,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:33:05,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:06,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:06,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:06,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-26 19:33:06,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732310490] [2020-10-26 19:33:06,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:06,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:33:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328080972] [2020-10-26 19:33:06,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:33:06,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:33:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:33:06,341 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 42 states. [2020-10-26 19:33:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:07,042 INFO L93 Difference]: Finished difference Result 271 states and 276 transitions. [2020-10-26 19:33:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:33:07,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 169 [2020-10-26 19:33:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:07,044 INFO L225 Difference]: With dead ends: 271 [2020-10-26 19:33:07,044 INFO L226 Difference]: Without dead ends: 180 [2020-10-26 19:33:07,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:33:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-26 19:33:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-26 19:33:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:33:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2020-10-26 19:33:07,056 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 169 [2020-10-26 19:33:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:07,056 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2020-10-26 19:33:07,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:33:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2020-10-26 19:33:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:33:07,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:07,058 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:07,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:33:07,058 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:07,059 INFO L82 PathProgramCache]: Analyzing trace with hash 261009958, now seen corresponding path program 39 times [2020-10-26 19:33:07,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:07,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937174272] [2020-10-26 19:33:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:07,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:12,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:33:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:13,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:13,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:13,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:13,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:13,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:13,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-26 19:33:13,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937174272] [2020-10-26 19:33:13,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:13,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:33:13,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479292325] [2020-10-26 19:33:13,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:33:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:33:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:33:13,504 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 43 states. [2020-10-26 19:33:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:14,035 INFO L93 Difference]: Finished difference Result 277 states and 282 transitions. [2020-10-26 19:33:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:33:14,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 173 [2020-10-26 19:33:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:14,038 INFO L225 Difference]: With dead ends: 277 [2020-10-26 19:33:14,038 INFO L226 Difference]: Without dead ends: 184 [2020-10-26 19:33:14,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:33:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-26 19:33:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-26 19:33:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:33:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-10-26 19:33:14,049 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 173 [2020-10-26 19:33:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:14,049 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-10-26 19:33:14,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:33:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-10-26 19:33:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:33:14,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:14,051 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:14,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:33:14,051 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1376358690, now seen corresponding path program 40 times [2020-10-26 19:33:14,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:14,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832966659] [2020-10-26 19:33:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:14,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:19,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-26 19:33:19,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:33:19,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:33:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:33:19,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:20,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:20,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:20,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:20,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:20,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-26 19:33:20,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832966659] [2020-10-26 19:33:20,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:20,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:33:20,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147741816] [2020-10-26 19:33:20,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:33:20,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:33:20,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:33:20,558 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 44 states.