/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-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:43:56,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:43:56,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:43:56,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:43:56,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:43:56,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:43:56,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:43:56,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:43:56,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:43:56,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:43:56,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:43:56,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:43:56,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:43:56,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:43:56,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:43:56,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:43:56,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:43:56,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:43:56,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:43:56,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:43:56,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:43:56,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:43:56,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:43:56,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:43:56,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:43:56,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:43:56,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:43:56,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:43:56,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:43:56,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-26 19:43:56,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:43:56,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:43:56,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:43:56,215 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 19:43:56,242 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:43:56,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:43:56,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:43:56,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:43:56,245 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:43:56,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:43:56,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:43:56,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:43:56,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:43:56,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:43:56,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:43:56,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:43:56,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:43:56,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:43:56,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:43:56,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:43:56,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:43:56,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:43:56,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:43:56,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:43:56,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:43:56,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:43:56,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:43:56,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:43:56,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:43:56,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:43:56,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:43:56,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:43:56,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:43:56,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:43:56,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:43:56,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:43:56,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:43:56,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:43:56,725 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:43:56,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-26 19:43:56,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b91d6fa17/5ff2e032bfe448fa8cdd2ac7649f7a8c/FLAG21485d2bb [2020-10-26 19:43:57,504 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:43:57,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-26 19:43:57,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b91d6fa17/5ff2e032bfe448fa8cdd2ac7649f7a8c/FLAG21485d2bb [2020-10-26 19:43:57,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b91d6fa17/5ff2e032bfe448fa8cdd2ac7649f7a8c [2020-10-26 19:43:57,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:43:57,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:43:57,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:43:57,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:43:57,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:43:57,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:43:57" (1/1) ... [2020-10-26 19:43:57,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1beeac91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:57, skipping insertion in model container [2020-10-26 19:43:57,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:43:57" (1/1) ... [2020-10-26 19:43:57,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:43:57,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:43:58,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:43:58,101 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:43:58,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:43:58,136 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:43:58,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58 WrapperNode [2020-10-26 19:43:58,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:43:58,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:43:58,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:43:58,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:43:58,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (1/1) ... [2020-10-26 19:43:58,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:43:58,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:43:58,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:43:58,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:43:58,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (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 19:43:58,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:43:58,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:43:58,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:43:58,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:43:58,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:43:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:43:58,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:43:58,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:43:58,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:43:58,263 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:43:58,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:43:58,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:43:58,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:43:58,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:43:58,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:43:58,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:43:58,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:43:58,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:43:58,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:43:58,547 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:43:58,547 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:43:58,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:43:58 BoogieIcfgContainer [2020-10-26 19:43:58,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:43:58,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:43:58,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:43:58,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:43:58,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:43:57" (1/3) ... [2020-10-26 19:43:58,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451b6982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:43:58, skipping insertion in model container [2020-10-26 19:43:58,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:43:58" (2/3) ... [2020-10-26 19:43:58,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451b6982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:43:58, skipping insertion in model container [2020-10-26 19:43:58,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:43:58" (3/3) ... [2020-10-26 19:43:58,563 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2020-10-26 19:43:58,603 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:43:58,614 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:43:58,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:43:58,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:43:58,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:43:58,728 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:43:58,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:43:58,731 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:43:58,731 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:43:58,732 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:43:58,732 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:43:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-26 19:43:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 19:43:58,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:58,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:58,771 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:58,790 INFO L82 PathProgramCache]: Analyzing trace with hash -110565287, now seen corresponding path program 1 times [2020-10-26 19:43:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:58,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050568245] [2020-10-26 19:43:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:43:59,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 19:43:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:43:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:43:59,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:59,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:43:59,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:59,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:59,232 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 19:43:59,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050568245] [2020-10-26 19:43:59,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:43:59,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:43:59,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811199843] [2020-10-26 19:43:59,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:43:59,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:43:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:43:59,272 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-26 19:43:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:59,377 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-26 19:43:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:43:59,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-26 19:43:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:59,388 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:43:59,388 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:43:59,392 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 19:43:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:43:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 19:43:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 19:43:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 19:43:59,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-26 19:43:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:59,440 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 19:43:59,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:43:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 19:43:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 19:43:59,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:59,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:59,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:43:59,442 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2144226899, now seen corresponding path program 1 times [2020-10-26 19:43:59,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:59,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612592351] [2020-10-26 19:43:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:43:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 19:43:59,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:43:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:43:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:59,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:59,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:59,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 19:43:59,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:43:59,694 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 19:43:59,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612592351] [2020-10-26 19:43:59,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:43:59,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:43:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376502601] [2020-10-26 19:43:59,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:43:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:43:59,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:43:59,706 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-26 19:43:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:59,813 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-26 19:43:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:43:59,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-26 19:43:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:59,816 INFO L225 Difference]: With dead ends: 43 [2020-10-26 19:43:59,817 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:43:59,818 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 19:43:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:43:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-26 19:43:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:43:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-26 19:43:59,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-10-26 19:43:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:59,831 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-26 19:43:59,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:43:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-26 19:43:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:43:59,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:59,834 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 19:43:59,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:43:59,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -246080399, now seen corresponding path program 1 times [2020-10-26 19:43:59,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:59,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471119114] [2020-10-26 19:43:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:00,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:00,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:44:00,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:00,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-26 19:44:00,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:00,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:44:00,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:44:00,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:00,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:00,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:00,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:00,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:00,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471119114] [2020-10-26 19:44:00,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:00,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:44:00,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992502568] [2020-10-26 19:44:00,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:44:00,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:44:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:44:00,589 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-10-26 19:44:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:00,895 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-26 19:44:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:44:00,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-26 19:44:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:00,897 INFO L225 Difference]: With dead ends: 42 [2020-10-26 19:44:00,897 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:44:00,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:44:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-26 19:44:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:44:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-26 19:44:00,909 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-10-26 19:44:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:00,910 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-26 19:44:00,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:44:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-26 19:44:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:44:00,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:00,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:00,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:44:00,912 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1377191, now seen corresponding path program 1 times [2020-10-26 19:44:00,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:00,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058716590] [2020-10-26 19:44:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:44:01,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 19:44:01,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:44:01,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:44:01,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:01,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:01,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:01,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:44:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:01,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:01,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:01,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:01,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058716590] [2020-10-26 19:44:01,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:01,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:44:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757670049] [2020-10-26 19:44:01,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:44:01,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:44:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:44:01,076 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2020-10-26 19:44:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:01,175 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:44:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:44:01,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-26 19:44:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:01,177 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:44:01,177 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:44:01,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:44:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:44:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:44:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:44:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-26 19:44:01,188 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 26 [2020-10-26 19:44:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:01,188 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-26 19:44:01,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:44:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-26 19:44:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:44:01,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:01,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:01,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:44:01,190 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:01,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1485361019, now seen corresponding path program 2 times [2020-10-26 19:44:01,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:01,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188334620] [2020-10-26 19:44:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:44:01,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 19:44:01,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:44:01,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:01,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:01,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:01,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:01,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:01,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:44:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:01,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:01,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:01,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:01,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188334620] [2020-10-26 19:44:01,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:44:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864027359] [2020-10-26 19:44:01,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:44:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:44:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:44:01,368 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2020-10-26 19:44:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:01,482 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:44:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:44:01,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-26 19:44:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:01,483 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:44:01,483 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:44:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:44:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:44:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-26 19:44:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:44:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:44:01,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2020-10-26 19:44:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:01,494 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:44:01,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:44:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:44:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:44:01,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:01,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:01,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:44:01,496 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash 16671261, now seen corresponding path program 3 times [2020-10-26 19:44:01,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:01,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110598512] [2020-10-26 19:44:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:44:01,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 19:44:01,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:44:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:44:01,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:01,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:01,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:44:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:01,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:01,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:01,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110598512] [2020-10-26 19:44:01,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:01,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:44:01,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621316968] [2020-10-26 19:44:01,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:44:01,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:44:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:44:01,685 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-10-26 19:44:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:01,815 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-26 19:44:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:44:01,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-26 19:44:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:01,817 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:44:01,817 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:44:01,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:44:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:44:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-26 19:44:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:44:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-26 19:44:01,828 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 30 [2020-10-26 19:44:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:01,828 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-26 19:44:01,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:44:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-26 19:44:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:44:01,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:01,830 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:01,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:44:01,830 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:01,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1650054207, now seen corresponding path program 4 times [2020-10-26 19:44:01,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:01,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570196273] [2020-10-26 19:44:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:01,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:01,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:44:01,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:01,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 19:44:01,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:44:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:44:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:02,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:02,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:02,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:02,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:02,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:44:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:02,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:02,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:02,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:02,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:02,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:02,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570196273] [2020-10-26 19:44:02,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:02,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:44:02,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784006827] [2020-10-26 19:44:02,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:44:02,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:44:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:44:02,106 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 8 states. [2020-10-26 19:44:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:02,282 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-10-26 19:44:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:44:02,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-26 19:44:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:02,284 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:44:02,284 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:44:02,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:44:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:44:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-26 19:44:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:44:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-26 19:44:02,294 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 32 [2020-10-26 19:44:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:02,294 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-26 19:44:02,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:44:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-26 19:44:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:44:02,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:02,296 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:02,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:44:02,296 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash -626965023, now seen corresponding path program 5 times [2020-10-26 19:44:02,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:02,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562002963] [2020-10-26 19:44:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:02,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:44:02,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:02,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 19:44:02,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:44:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:44:02,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:44:02,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:02,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:02,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:02,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:02,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:02,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:02,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:02,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:44:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:02,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:02,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562002963] [2020-10-26 19:44:02,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:02,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:44:02,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849916007] [2020-10-26 19:44:02,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:44:02,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:44:02,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:44:02,574 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 9 states. [2020-10-26 19:44:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:02,761 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-26 19:44:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:44:02,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-26 19:44:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:02,763 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:44:02,763 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:44:02,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:44:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:44:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:44:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:44:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-26 19:44:02,784 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 34 [2020-10-26 19:44:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:02,784 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-26 19:44:02,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:44:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-26 19:44:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:44:02,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:02,790 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:02,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:44:02,790 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1590875907, now seen corresponding path program 6 times [2020-10-26 19:44:02,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:02,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777174871] [2020-10-26 19:44:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:02,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:44:02,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:02,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 19:44:02,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:44:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:44:02,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:03,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:03,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:03,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:44:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:03,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:03,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:03,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777174871] [2020-10-26 19:44:03,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:03,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:44:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374138443] [2020-10-26 19:44:03,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:44:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:44:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:44:03,114 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 10 states. [2020-10-26 19:44:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:03,297 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-26 19:44:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:44:03,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-26 19:44:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:03,299 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:44:03,299 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:44:03,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:44:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:44:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-26 19:44:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:44:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-10-26 19:44:03,316 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 36 [2020-10-26 19:44:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:03,316 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-10-26 19:44:03,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:44:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-10-26 19:44:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:44:03,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:03,321 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:03,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:44:03,323 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1662736475, now seen corresponding path program 7 times [2020-10-26 19:44:03,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:03,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414595213] [2020-10-26 19:44:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:44:03,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-26 19:44:03,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:44:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:44:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:03,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:03,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:03,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:44:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:03,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:03,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:03,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:03,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414595213] [2020-10-26 19:44:03,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:03,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:44:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494662066] [2020-10-26 19:44:03,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:44:03,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:44:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:44:03,707 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 11 states. [2020-10-26 19:44:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:03,896 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2020-10-26 19:44:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:44:03,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-26 19:44:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:03,898 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:44:03,898 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:44:03,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 19:44:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:44:03,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-26 19:44:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:44:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-26 19:44:03,910 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 38 [2020-10-26 19:44:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:03,910 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-26 19:44:03,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:44:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-26 19:44:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:44:03,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:03,911 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:03,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:44:03,912 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1648044089, now seen corresponding path program 8 times [2020-10-26 19:44:03,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:03,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397975637] [2020-10-26 19:44:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:44:04,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:04,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:04,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:04,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:04,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:04,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:44:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:04,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:04,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:04,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397975637] [2020-10-26 19:44:04,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:04,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:44:04,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950872671] [2020-10-26 19:44:04,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:44:04,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:44:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:04,341 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 12 states. [2020-10-26 19:44:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:04,561 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-26 19:44:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:44:04,562 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-26 19:44:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:04,563 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:44:04,563 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:44:04,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:44:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-26 19:44:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:44:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-26 19:44:04,573 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 40 [2020-10-26 19:44:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:04,573 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-26 19:44:04,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:44:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-26 19:44:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:44:04,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:04,575 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:04,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:44:04,575 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -413563031, now seen corresponding path program 9 times [2020-10-26 19:44:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:04,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058322897] [2020-10-26 19:44:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:44:04,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-26 19:44:04,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:44:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:44:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:04,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:04,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:04,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:44:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:04,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:04,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:04,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:04,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:04,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:04,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058322897] [2020-10-26 19:44:04,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:04,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:44:04,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151911997] [2020-10-26 19:44:04,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:44:04,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:44:04,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:44:04,946 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 13 states. [2020-10-26 19:44:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:05,175 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-26 19:44:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:44:05,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-26 19:44:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:05,177 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:44:05,177 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:44:05,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:44:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:44:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:44:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:44:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-10-26 19:44:05,198 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 42 [2020-10-26 19:44:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:05,198 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-10-26 19:44:05,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:44:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-10-26 19:44:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:44:05,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:05,199 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:05,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:44:05,200 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash 511760011, now seen corresponding path program 10 times [2020-10-26 19:44:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:05,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449747404] [2020-10-26 19:44:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:44:05,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-26 19:44:05,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:44:05,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:05,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:44:05,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:05,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:05,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:44:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:05,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:05,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:05,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449747404] [2020-10-26 19:44:05,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:05,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:44:05,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294001018] [2020-10-26 19:44:05,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:44:05,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:05,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:44:05,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:05,612 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 14 states. [2020-10-26 19:44:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:05,950 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2020-10-26 19:44:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:44:05,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-26 19:44:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:05,952 INFO L225 Difference]: With dead ends: 170 [2020-10-26 19:44:05,952 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:44:05,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:44:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-26 19:44:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:44:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-10-26 19:44:05,961 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 44 [2020-10-26 19:44:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:05,961 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-10-26 19:44:05,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:44:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-10-26 19:44:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:44:05,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:05,963 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:05,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:44:05,963 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:05,967 INFO L82 PathProgramCache]: Analyzing trace with hash 688973101, now seen corresponding path program 11 times [2020-10-26 19:44:05,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:05,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163936896] [2020-10-26 19:44:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:06,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:44:06,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:06,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-26 19:44:06,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:44:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:44:06,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:06,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:06,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:06,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:06,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:44:06,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:06,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:06,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:06,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:06,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:06,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:44:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:06,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:06,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:06,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:06,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163936896] [2020-10-26 19:44:06,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:06,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:44:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151319269] [2020-10-26 19:44:06,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:44:06,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:44:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:06,545 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 15 states. [2020-10-26 19:44:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:06,865 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-10-26 19:44:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:44:06,865 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-26 19:44:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:06,867 INFO L225 Difference]: With dead ends: 182 [2020-10-26 19:44:06,867 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:44:06,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:44:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-26 19:44:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:44:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-10-26 19:44:06,877 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 46 [2020-10-26 19:44:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:06,878 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-10-26 19:44:06,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:44:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-10-26 19:44:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:44:06,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:06,879 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:06,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:44:06,879 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash -807939249, now seen corresponding path program 12 times [2020-10-26 19:44:06,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:06,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606889478] [2020-10-26 19:44:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:06,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:07,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:07,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:44:07,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:07,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:07,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:07,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:07,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:44:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:07,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:07,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:07,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:07,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:07,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:07,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:07,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:07,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:07,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606889478] [2020-10-26 19:44:07,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:07,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:44:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994051993] [2020-10-26 19:44:07,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:44:07,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:44:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:44:07,397 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 16 states. [2020-10-26 19:44:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:07,739 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2020-10-26 19:44:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:44:07,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-26 19:44:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:07,740 INFO L225 Difference]: With dead ends: 194 [2020-10-26 19:44:07,740 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:44:07,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:44:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:44:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-26 19:44:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:44:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2020-10-26 19:44:07,763 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 48 [2020-10-26 19:44:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:07,763 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2020-10-26 19:44:07,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:44:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2020-10-26 19:44:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:44:07,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:07,764 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:07,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:44:07,765 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash -526663439, now seen corresponding path program 13 times [2020-10-26 19:44:07,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:07,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568759667] [2020-10-26 19:44:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:08,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:08,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:44:08,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-26 19:44:08,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:44:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:44:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:08,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:08,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:08,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:08,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:08,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:44:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:08,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:08,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:08,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:08,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:08,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:08,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:08,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:08,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568759667] [2020-10-26 19:44:08,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:08,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:44:08,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992142243] [2020-10-26 19:44:08,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:44:08,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:44:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:44:08,368 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 17 states. [2020-10-26 19:44:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:08,695 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2020-10-26 19:44:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:44:08,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-26 19:44:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:08,697 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:44:08,697 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:44:08,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:44:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:44:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:44:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:44:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2020-10-26 19:44:08,707 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 50 [2020-10-26 19:44:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:08,707 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2020-10-26 19:44:08,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:44:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2020-10-26 19:44:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:44:08,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:08,708 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:08,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:44:08,709 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -803549677, now seen corresponding path program 14 times [2020-10-26 19:44:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:08,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264934756] [2020-10-26 19:44:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:08,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:09,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:09,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:44:09,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:09,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-26 19:44:09,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:09,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:44:09,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:09,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:44:09,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:09,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:09,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:09,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:09,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:44:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:09,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:09,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:09,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:09,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264934756] [2020-10-26 19:44:09,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:09,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:44:09,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588099387] [2020-10-26 19:44:09,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:44:09,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:44:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:44:09,314 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand 18 states. [2020-10-26 19:44:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:09,652 INFO L93 Difference]: Finished difference Result 218 states and 250 transitions. [2020-10-26 19:44:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:44:09,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-26 19:44:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:09,654 INFO L225 Difference]: With dead ends: 218 [2020-10-26 19:44:09,654 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:44:09,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:44:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:44:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-26 19:44:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:44:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2020-10-26 19:44:09,666 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 52 [2020-10-26 19:44:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:09,667 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2020-10-26 19:44:09,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:44:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2020-10-26 19:44:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:44:09,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:09,668 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:09,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:44:09,669 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash -603252043, now seen corresponding path program 15 times [2020-10-26 19:44:09,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:09,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002565214] [2020-10-26 19:44:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:09,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:44:10,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-26 19:44:10,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:44:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:44:10,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:44:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:10,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:10,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:10,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002565214] [2020-10-26 19:44:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:44:10,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081221105] [2020-10-26 19:44:10,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:44:10,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:10,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:44:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:44:10,389 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand 19 states. [2020-10-26 19:44:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:10,755 INFO L93 Difference]: Finished difference Result 230 states and 264 transitions. [2020-10-26 19:44:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:44:10,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-26 19:44:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:10,757 INFO L225 Difference]: With dead ends: 230 [2020-10-26 19:44:10,757 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:44:10,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:44:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:44:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-26 19:44:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-26 19:44:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2020-10-26 19:44:10,772 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 54 [2020-10-26 19:44:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:10,772 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2020-10-26 19:44:10,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:44:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2020-10-26 19:44:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:44:10,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:10,773 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:10,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:44:10,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1390754089, now seen corresponding path program 16 times [2020-10-26 19:44:10,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:10,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434833782] [2020-10-26 19:44:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:11,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:11,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:44:11,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:11,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:11,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:11,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:11,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:11,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:11,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:44:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:11,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:11,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:11,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:11,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:11,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:11,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:11,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:11,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:11,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:11,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:11,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434833782] [2020-10-26 19:44:11,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:11,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:44:11,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226550829] [2020-10-26 19:44:11,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:44:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:44:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:44:11,501 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand 20 states. [2020-10-26 19:44:11,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:11,877 INFO L93 Difference]: Finished difference Result 242 states and 278 transitions. [2020-10-26 19:44:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:44:11,877 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-10-26 19:44:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:11,879 INFO L225 Difference]: With dead ends: 242 [2020-10-26 19:44:11,879 INFO L226 Difference]: Without dead ends: 145 [2020-10-26 19:44:11,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:44:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-26 19:44:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-10-26 19:44:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-26 19:44:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2020-10-26 19:44:11,893 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 56 [2020-10-26 19:44:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:11,894 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2020-10-26 19:44:11,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:44:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2020-10-26 19:44:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:44:11,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:11,897 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:11,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:44:11,897 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:11,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2028991097, now seen corresponding path program 17 times [2020-10-26 19:44:11,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:11,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792545979] [2020-10-26 19:44:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:12,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:12,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:44:12,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-26 19:44:12,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:44:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:12,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:44:12,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:12,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:12,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:12,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:12,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:12,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:12,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:12,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:44:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:12,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:12,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:12,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:12,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:12,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:12,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792545979] [2020-10-26 19:44:12,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:12,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:44:12,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497358440] [2020-10-26 19:44:12,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:44:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:12,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:44:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:44:12,888 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand 21 states. [2020-10-26 19:44:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:13,257 INFO L93 Difference]: Finished difference Result 254 states and 292 transitions. [2020-10-26 19:44:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:44:13,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-26 19:44:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:13,259 INFO L225 Difference]: With dead ends: 254 [2020-10-26 19:44:13,259 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:44:13,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:44:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:44:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-26 19:44:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:44:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2020-10-26 19:44:13,271 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 58 [2020-10-26 19:44:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:13,271 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2020-10-26 19:44:13,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:44:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2020-10-26 19:44:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:44:13,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:13,276 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:13,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:44:13,276 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1540833893, now seen corresponding path program 18 times [2020-10-26 19:44:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:13,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291459622] [2020-10-26 19:44:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:13,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:44:13,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:14,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:44:14,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:44:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:14,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291459622] [2020-10-26 19:44:14,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:14,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:44:14,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931764382] [2020-10-26 19:44:14,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:44:14,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:44:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:44:14,181 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand 22 states. [2020-10-26 19:44:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:14,572 INFO L93 Difference]: Finished difference Result 266 states and 306 transitions. [2020-10-26 19:44:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:44:14,572 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-26 19:44:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:14,574 INFO L225 Difference]: With dead ends: 266 [2020-10-26 19:44:14,574 INFO L226 Difference]: Without dead ends: 159 [2020-10-26 19:44:14,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:44:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-26 19:44:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-26 19:44:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-26 19:44:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2020-10-26 19:44:14,592 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 60 [2020-10-26 19:44:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:14,592 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2020-10-26 19:44:14,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:44:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2020-10-26 19:44:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:44:14,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:14,593 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:14,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:44:14,593 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash -463779779, now seen corresponding path program 19 times [2020-10-26 19:44:14,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:14,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088212089] [2020-10-26 19:44:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:44:15,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:15,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:44:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:15,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:15,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:15,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:15,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:15,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:15,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:15,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088212089] [2020-10-26 19:44:15,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:15,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:44:15,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384895013] [2020-10-26 19:44:15,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:44:15,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:15,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:44:15,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:44:15,500 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand 23 states. [2020-10-26 19:44:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:16,026 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2020-10-26 19:44:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:44:16,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2020-10-26 19:44:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:16,031 INFO L225 Difference]: With dead ends: 278 [2020-10-26 19:44:16,031 INFO L226 Difference]: Without dead ends: 166 [2020-10-26 19:44:16,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:44:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-26 19:44:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-26 19:44:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-26 19:44:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 185 transitions. [2020-10-26 19:44:16,051 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 185 transitions. Word has length 62 [2020-10-26 19:44:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:16,052 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 185 transitions. [2020-10-26 19:44:16,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:44:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 185 transitions. [2020-10-26 19:44:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:44:16,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:16,053 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:16,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:44:16,053 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash -501894561, now seen corresponding path program 20 times [2020-10-26 19:44:16,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:16,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962563144] [2020-10-26 19:44:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:16,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:16,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:44:16,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:16,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-26 19:44:16,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:16,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:44:16,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:16,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:44:16,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:16,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:16,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:16,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:44:16,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:16,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:16,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:44:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:16,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:16,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:16,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:16,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:16,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:16,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:16,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962563144] [2020-10-26 19:44:16,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:16,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:44:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021363371] [2020-10-26 19:44:16,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:44:16,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:16,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:44:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:44:16,974 INFO L87 Difference]: Start difference. First operand 164 states and 185 transitions. Second operand 24 states. [2020-10-26 19:44:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:17,463 INFO L93 Difference]: Finished difference Result 290 states and 334 transitions. [2020-10-26 19:44:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:44:17,463 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-10-26 19:44:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:17,465 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:44:17,466 INFO L226 Difference]: Without dead ends: 173 [2020-10-26 19:44:17,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:44:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-26 19:44:17,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-10-26 19:44:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-26 19:44:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2020-10-26 19:44:17,480 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 64 [2020-10-26 19:44:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:17,482 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2020-10-26 19:44:17,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:44:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2020-10-26 19:44:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:44:17,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:17,483 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:17,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:44:17,483 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1524505601, now seen corresponding path program 21 times [2020-10-26 19:44:17,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:17,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252728031] [2020-10-26 19:44:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:18,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:18,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:44:18,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:18,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-26 19:44:18,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:44:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:44:18,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:18,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:18,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:18,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:18,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:44:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:18,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252728031] [2020-10-26 19:44:18,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:18,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:44:18,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511160959] [2020-10-26 19:44:18,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:44:18,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:18,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:44:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:44:18,410 INFO L87 Difference]: Start difference. First operand 171 states and 193 transitions. Second operand 25 states. [2020-10-26 19:44:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:19,001 INFO L93 Difference]: Finished difference Result 302 states and 348 transitions. [2020-10-26 19:44:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:44:19,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-26 19:44:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:19,003 INFO L225 Difference]: With dead ends: 302 [2020-10-26 19:44:19,003 INFO L226 Difference]: Without dead ends: 180 [2020-10-26 19:44:19,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:44:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-26 19:44:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-26 19:44:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:44:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2020-10-26 19:44:19,013 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 66 [2020-10-26 19:44:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:19,014 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2020-10-26 19:44:19,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:44:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2020-10-26 19:44:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:44:19,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:19,015 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:19,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:44:19,015 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:19,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1020091101, now seen corresponding path program 22 times [2020-10-26 19:44:19,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:19,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837272970] [2020-10-26 19:44:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:19,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:44:19,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:19,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-26 19:44:19,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:19,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:44:19,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:19,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:44:19,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:20,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:20,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:20,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:20,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:20,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:44:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:20,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:20,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:20,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:20,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:20,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837272970] [2020-10-26 19:44:20,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:20,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:44:20,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472901695] [2020-10-26 19:44:20,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:44:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:20,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:44:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:44:20,060 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand 26 states. [2020-10-26 19:44:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:20,608 INFO L93 Difference]: Finished difference Result 314 states and 362 transitions. [2020-10-26 19:44:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:44:20,609 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-10-26 19:44:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:20,611 INFO L225 Difference]: With dead ends: 314 [2020-10-26 19:44:20,611 INFO L226 Difference]: Without dead ends: 187 [2020-10-26 19:44:20,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:44:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-26 19:44:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-26 19:44:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:44:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 209 transitions. [2020-10-26 19:44:20,623 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 209 transitions. Word has length 68 [2020-10-26 19:44:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:20,624 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 209 transitions. [2020-10-26 19:44:20,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:44:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 209 transitions. [2020-10-26 19:44:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:44:20,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:20,625 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:20,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:44:20,625 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1753836997, now seen corresponding path program 23 times [2020-10-26 19:44:20,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:20,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805509289] [2020-10-26 19:44:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:44:21,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-26 19:44:21,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:44:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:44:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:21,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:21,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:21,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:44:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:21,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:21,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:21,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:21,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805509289] [2020-10-26 19:44:21,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:21,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:44:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938521993] [2020-10-26 19:44:21,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:44:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:44:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:44:21,717 INFO L87 Difference]: Start difference. First operand 185 states and 209 transitions. Second operand 27 states. [2020-10-26 19:44:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:22,322 INFO L93 Difference]: Finished difference Result 326 states and 376 transitions. [2020-10-26 19:44:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:44:22,322 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-26 19:44:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:22,325 INFO L225 Difference]: With dead ends: 326 [2020-10-26 19:44:22,325 INFO L226 Difference]: Without dead ends: 194 [2020-10-26 19:44:22,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:44:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-26 19:44:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-26 19:44:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-26 19:44:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 217 transitions. [2020-10-26 19:44:22,338 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 217 transitions. Word has length 70 [2020-10-26 19:44:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:22,338 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 217 transitions. [2020-10-26 19:44:22,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:44:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 217 transitions. [2020-10-26 19:44:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:44:22,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:22,340 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:22,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:44:22,340 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:22,340 INFO L82 PathProgramCache]: Analyzing trace with hash 324048359, now seen corresponding path program 24 times [2020-10-26 19:44:22,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:22,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187800154] [2020-10-26 19:44:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:23,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:23,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:44:23,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:23,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-26 19:44:23,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:44:23,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:23,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:44:23,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:23,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:23,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:23,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:23,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:23,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:23,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:23,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:23,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:44:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:23,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:23,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:23,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:23,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:23,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:23,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:23,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:23,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:23,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:23,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:23,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187800154] [2020-10-26 19:44:23,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:23,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:44:23,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771313959] [2020-10-26 19:44:23,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:44:23,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:23,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:44:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:44:23,562 INFO L87 Difference]: Start difference. First operand 192 states and 217 transitions. Second operand 28 states. [2020-10-26 19:44:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:24,150 INFO L93 Difference]: Finished difference Result 338 states and 390 transitions. [2020-10-26 19:44:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:44:24,150 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-26 19:44:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:24,152 INFO L225 Difference]: With dead ends: 338 [2020-10-26 19:44:24,152 INFO L226 Difference]: Without dead ends: 201 [2020-10-26 19:44:24,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:44:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-26 19:44:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-26 19:44:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-26 19:44:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 225 transitions. [2020-10-26 19:44:24,168 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 225 transitions. Word has length 72 [2020-10-26 19:44:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:24,169 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 225 transitions. [2020-10-26 19:44:24,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:44:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 225 transitions. [2020-10-26 19:44:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:44:24,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:24,171 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:24,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:44:24,171 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:24,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:24,172 INFO L82 PathProgramCache]: Analyzing trace with hash 686701961, now seen corresponding path program 25 times [2020-10-26 19:44:24,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:24,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763032981] [2020-10-26 19:44:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:44:24,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:25,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:25,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:25,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:25,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:25,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:25,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:25,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:44:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:25,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:25,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:25,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:25,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:25,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:25,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:25,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763032981] [2020-10-26 19:44:25,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:25,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:44:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945624429] [2020-10-26 19:44:25,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:44:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:44:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:44:25,535 INFO L87 Difference]: Start difference. First operand 199 states and 225 transitions. Second operand 29 states. [2020-10-26 19:44:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:26,311 INFO L93 Difference]: Finished difference Result 350 states and 404 transitions. [2020-10-26 19:44:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:44:26,311 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2020-10-26 19:44:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:26,313 INFO L225 Difference]: With dead ends: 350 [2020-10-26 19:44:26,313 INFO L226 Difference]: Without dead ends: 208 [2020-10-26 19:44:26,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:44:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-26 19:44:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-10-26 19:44:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-26 19:44:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 233 transitions. [2020-10-26 19:44:26,327 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 233 transitions. Word has length 74 [2020-10-26 19:44:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:26,328 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 233 transitions. [2020-10-26 19:44:26,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:44:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 233 transitions. [2020-10-26 19:44:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:44:26,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:26,329 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:26,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:44:26,329 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:26,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1304462507, now seen corresponding path program 26 times [2020-10-26 19:44:26,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:26,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368362717] [2020-10-26 19:44:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:27,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:44:27,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:27,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-26 19:44:27,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:44:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:44:27,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:27,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:27,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:27,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:27,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:44:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:27,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:27,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:27,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:27,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:27,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:27,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368362717] [2020-10-26 19:44:27,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:27,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:44:27,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267258639] [2020-10-26 19:44:27,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:44:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:44:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:44:27,608 INFO L87 Difference]: Start difference. First operand 206 states and 233 transitions. Second operand 30 states. [2020-10-26 19:44:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:28,376 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2020-10-26 19:44:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:44:28,376 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-10-26 19:44:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:28,378 INFO L225 Difference]: With dead ends: 362 [2020-10-26 19:44:28,378 INFO L226 Difference]: Without dead ends: 215 [2020-10-26 19:44:28,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:44:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-26 19:44:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2020-10-26 19:44:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-26 19:44:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 241 transitions. [2020-10-26 19:44:28,394 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 241 transitions. Word has length 76 [2020-10-26 19:44:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:28,395 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 241 transitions. [2020-10-26 19:44:28,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:44:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 241 transitions. [2020-10-26 19:44:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:44:28,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:28,396 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:28,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:44:28,396 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2028106931, now seen corresponding path program 27 times [2020-10-26 19:44:28,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:28,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525947070] [2020-10-26 19:44:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:44:29,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:29,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:29,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:29,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:29,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:44:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:29,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:29,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525947070] [2020-10-26 19:44:29,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:29,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:44:29,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479037138] [2020-10-26 19:44:29,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:44:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:44:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:44:29,740 INFO L87 Difference]: Start difference. First operand 213 states and 241 transitions. Second operand 31 states. [2020-10-26 19:44:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:30,410 INFO L93 Difference]: Finished difference Result 374 states and 432 transitions. [2020-10-26 19:44:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:44:30,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-26 19:44:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:30,413 INFO L225 Difference]: With dead ends: 374 [2020-10-26 19:44:30,413 INFO L226 Difference]: Without dead ends: 222 [2020-10-26 19:44:30,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:44:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-26 19:44:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-26 19:44:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-26 19:44:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2020-10-26 19:44:30,427 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 78 [2020-10-26 19:44:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:30,428 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2020-10-26 19:44:30,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:44:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2020-10-26 19:44:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:44:30,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:30,429 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:30,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:44:30,429 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -581734033, now seen corresponding path program 28 times [2020-10-26 19:44:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643892847] [2020-10-26 19:44:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:44:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:31,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:44:31,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:31,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:31,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:31,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:31,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:31,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:31,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:44:31,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:44:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:31,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:31,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:31,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:31,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643892847] [2020-10-26 19:44:31,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:31,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:44:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296486010] [2020-10-26 19:44:31,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:44:31,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:44:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:44:31,923 INFO L87 Difference]: Start difference. First operand 220 states and 249 transitions. Second operand 32 states. [2020-10-26 19:44:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:32,750 INFO L93 Difference]: Finished difference Result 386 states and 446 transitions. [2020-10-26 19:44:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:44:32,750 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2020-10-26 19:44:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:32,752 INFO L225 Difference]: With dead ends: 386 [2020-10-26 19:44:32,753 INFO L226 Difference]: Without dead ends: 229 [2020-10-26 19:44:32,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:44:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-26 19:44:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-26 19:44:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-26 19:44:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 257 transitions. [2020-10-26 19:44:32,768 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 257 transitions. Word has length 80 [2020-10-26 19:44:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:32,769 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 257 transitions. [2020-10-26 19:44:32,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:44:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 257 transitions. [2020-10-26 19:44:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:44:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:32,770 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:32,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:44:32,771 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2108184337, now seen corresponding path program 29 times [2020-10-26 19:44:32,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:32,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102128220] [2020-10-26 19:44:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:32,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:33,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:33,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:44:33,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:33,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-26 19:44:33,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:33,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:44:33,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:33,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:44:33,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:34,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:34,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:34,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:34,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:44:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:34,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:34,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:34,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:34,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102128220] [2020-10-26 19:44:34,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:34,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:44:34,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742745188] [2020-10-26 19:44:34,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:44:34,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:44:34,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:44:34,204 INFO L87 Difference]: Start difference. First operand 227 states and 257 transitions. Second operand 33 states. [2020-10-26 19:44:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:34,904 INFO L93 Difference]: Finished difference Result 398 states and 460 transitions. [2020-10-26 19:44:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:44:34,904 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2020-10-26 19:44:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:34,906 INFO L225 Difference]: With dead ends: 398 [2020-10-26 19:44:34,906 INFO L226 Difference]: Without dead ends: 236 [2020-10-26 19:44:34,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:44:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-26 19:44:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2020-10-26 19:44:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-26 19:44:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 265 transitions. [2020-10-26 19:44:34,922 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 265 transitions. Word has length 82 [2020-10-26 19:44:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:34,922 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 265 transitions. [2020-10-26 19:44:34,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:44:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 265 transitions. [2020-10-26 19:44:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:44:34,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:34,924 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:34,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:44:34,924 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:34,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1549425715, now seen corresponding path program 30 times [2020-10-26 19:44:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722792955] [2020-10-26 19:44:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:44:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:35,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:44:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:36,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:36,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:36,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:36,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:44:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:36,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:36,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722792955] [2020-10-26 19:44:36,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:36,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:44:36,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329510827] [2020-10-26 19:44:36,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:44:36,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:44:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:44:36,390 INFO L87 Difference]: Start difference. First operand 234 states and 265 transitions. Second operand 34 states. [2020-10-26 19:44:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:37,277 INFO L93 Difference]: Finished difference Result 410 states and 474 transitions. [2020-10-26 19:44:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:44:37,278 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-10-26 19:44:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:37,279 INFO L225 Difference]: With dead ends: 410 [2020-10-26 19:44:37,280 INFO L226 Difference]: Without dead ends: 243 [2020-10-26 19:44:37,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:44:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-26 19:44:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2020-10-26 19:44:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-26 19:44:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 273 transitions. [2020-10-26 19:44:37,296 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 273 transitions. Word has length 84 [2020-10-26 19:44:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:37,296 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 273 transitions. [2020-10-26 19:44:37,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:44:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 273 transitions. [2020-10-26 19:44:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:44:37,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:37,297 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:37,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:44:37,298 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1453301973, now seen corresponding path program 31 times [2020-10-26 19:44:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:37,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133602918] [2020-10-26 19:44:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:37,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:44:37,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:38,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:38,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:38,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:38,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:38,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:38,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:44:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:38,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:38,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:38,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133602918] [2020-10-26 19:44:38,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:38,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:44:38,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933007624] [2020-10-26 19:44:38,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:44:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:44:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:44:38,654 INFO L87 Difference]: Start difference. First operand 241 states and 273 transitions. Second operand 35 states. [2020-10-26 19:44:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:39,601 INFO L93 Difference]: Finished difference Result 422 states and 488 transitions. [2020-10-26 19:44:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:44:39,601 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-10-26 19:44:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:39,605 INFO L225 Difference]: With dead ends: 422 [2020-10-26 19:44:39,606 INFO L226 Difference]: Without dead ends: 250 [2020-10-26 19:44:39,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:44:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-26 19:44:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2020-10-26 19:44:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-26 19:44:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 281 transitions. [2020-10-26 19:44:39,628 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 281 transitions. Word has length 86 [2020-10-26 19:44:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:39,629 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 281 transitions. [2020-10-26 19:44:39,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:44:39,629 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 281 transitions. [2020-10-26 19:44:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:44:39,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:39,631 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:39,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:44:39,631 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash -727300873, now seen corresponding path program 32 times [2020-10-26 19:44:39,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:39,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959185616] [2020-10-26 19:44:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:44:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:41,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:41,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:41,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:41,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:41,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:41,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:41,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:41,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:41,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:41,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:41,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:41,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:44:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:41,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959185616] [2020-10-26 19:44:41,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:41,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:44:41,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142527026] [2020-10-26 19:44:41,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:44:41,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:44:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:44:41,138 INFO L87 Difference]: Start difference. First operand 248 states and 281 transitions. Second operand 36 states. [2020-10-26 19:44:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:42,034 INFO L93 Difference]: Finished difference Result 434 states and 502 transitions. [2020-10-26 19:44:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:44:42,035 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2020-10-26 19:44:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:42,037 INFO L225 Difference]: With dead ends: 434 [2020-10-26 19:44:42,037 INFO L226 Difference]: Without dead ends: 257 [2020-10-26 19:44:42,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:44:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-26 19:44:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2020-10-26 19:44:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-26 19:44:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 289 transitions. [2020-10-26 19:44:42,050 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 289 transitions. Word has length 88 [2020-10-26 19:44:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:42,051 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 289 transitions. [2020-10-26 19:44:42,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:44:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 289 transitions. [2020-10-26 19:44:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:44:42,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:42,052 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:42,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:44:42,052 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:42,052 INFO L82 PathProgramCache]: Analyzing trace with hash -342595431, now seen corresponding path program 33 times [2020-10-26 19:44:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:42,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002080051] [2020-10-26 19:44:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:44:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:43,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:43,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:43,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:43,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:43,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:44:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:43,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:43,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:43,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:43,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:43,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:43,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:43,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002080051] [2020-10-26 19:44:43,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:43,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:44:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705332796] [2020-10-26 19:44:43,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:44:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:44:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:44:43,631 INFO L87 Difference]: Start difference. First operand 255 states and 289 transitions. Second operand 37 states. [2020-10-26 19:44:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:44,552 INFO L93 Difference]: Finished difference Result 446 states and 516 transitions. [2020-10-26 19:44:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:44:44,553 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 90 [2020-10-26 19:44:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:44,555 INFO L225 Difference]: With dead ends: 446 [2020-10-26 19:44:44,555 INFO L226 Difference]: Without dead ends: 264 [2020-10-26 19:44:44,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:44:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-26 19:44:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-26 19:44:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-26 19:44:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 297 transitions. [2020-10-26 19:44:44,571 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 297 transitions. Word has length 90 [2020-10-26 19:44:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:44,571 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 297 transitions. [2020-10-26 19:44:44,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:44:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 297 transitions. [2020-10-26 19:44:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:44:44,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:44,572 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:44,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:44:44,573 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -7853125, now seen corresponding path program 34 times [2020-10-26 19:44:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:44,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776607167] [2020-10-26 19:44:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:44,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:45,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:44:45,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:46,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:46,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:46,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:44:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:46,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:46,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:46,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:46,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:46,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:46,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:46,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776607167] [2020-10-26 19:44:46,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:46,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:44:46,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179162182] [2020-10-26 19:44:46,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:44:46,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:44:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:44:46,159 INFO L87 Difference]: Start difference. First operand 262 states and 297 transitions. Second operand 38 states. [2020-10-26 19:44:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:47,251 INFO L93 Difference]: Finished difference Result 458 states and 530 transitions. [2020-10-26 19:44:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:44:47,251 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2020-10-26 19:44:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:47,253 INFO L225 Difference]: With dead ends: 458 [2020-10-26 19:44:47,253 INFO L226 Difference]: Without dead ends: 271 [2020-10-26 19:44:47,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:44:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-26 19:44:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-10-26 19:44:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-26 19:44:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2020-10-26 19:44:47,270 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 92 [2020-10-26 19:44:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:47,270 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2020-10-26 19:44:47,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:44:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2020-10-26 19:44:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:44:47,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:47,273 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:47,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:44:47,273 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:47,274 INFO L82 PathProgramCache]: Analyzing trace with hash -443044259, now seen corresponding path program 35 times [2020-10-26 19:44:47,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:47,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684761483] [2020-10-26 19:44:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:48,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:44:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:44:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:49,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:49,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:49,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:49,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:49,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:49,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684761483] [2020-10-26 19:44:49,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:49,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:44:49,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204500464] [2020-10-26 19:44:49,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:44:49,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:44:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:44:49,125 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand 39 states. [2020-10-26 19:44:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:50,247 INFO L93 Difference]: Finished difference Result 470 states and 544 transitions. [2020-10-26 19:44:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:44:50,248 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 94 [2020-10-26 19:44:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:50,250 INFO L225 Difference]: With dead ends: 470 [2020-10-26 19:44:50,250 INFO L226 Difference]: Without dead ends: 278 [2020-10-26 19:44:50,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:44:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-26 19:44:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2020-10-26 19:44:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-26 19:44:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 313 transitions. [2020-10-26 19:44:50,277 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 313 transitions. Word has length 94 [2020-10-26 19:44:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:50,277 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 313 transitions. [2020-10-26 19:44:50,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:44:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 313 transitions. [2020-10-26 19:44:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:44:50,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:50,278 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:50,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:44:50,279 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:50,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2049896321, now seen corresponding path program 36 times [2020-10-26 19:44:50,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:50,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585237845] [2020-10-26 19:44:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:50,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:51,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:51,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:44:51,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:51,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-26 19:44:51,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:44:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:51,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:44:51,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:52,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:52,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:52,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:44:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:52,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:52,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:52,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:52,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585237845] [2020-10-26 19:44:52,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:52,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:44:52,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708055352] [2020-10-26 19:44:52,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:44:52,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:44:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:44:52,419 INFO L87 Difference]: Start difference. First operand 276 states and 313 transitions. Second operand 40 states. [2020-10-26 19:44:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:53,624 INFO L93 Difference]: Finished difference Result 482 states and 558 transitions. [2020-10-26 19:44:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:44:53,624 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-10-26 19:44:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:53,627 INFO L225 Difference]: With dead ends: 482 [2020-10-26 19:44:53,627 INFO L226 Difference]: Without dead ends: 285 [2020-10-26 19:44:53,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:44:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-26 19:44:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2020-10-26 19:44:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-26 19:44:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 321 transitions. [2020-10-26 19:44:53,645 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 321 transitions. Word has length 96 [2020-10-26 19:44:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:53,645 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 321 transitions. [2020-10-26 19:44:53,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:44:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 321 transitions. [2020-10-26 19:44:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:44:53,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:53,646 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:53,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:44:53,647 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:53,647 INFO L82 PathProgramCache]: Analyzing trace with hash -46501343, now seen corresponding path program 37 times [2020-10-26 19:44:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:53,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281202388] [2020-10-26 19:44:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:53,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:54,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:54,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:44:54,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:54,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-26 19:44:54,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:54,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:44:54,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:54,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:44:54,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:55,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:55,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:55,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:55,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:55,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:55,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:44:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:55,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:55,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:55,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281202388] [2020-10-26 19:44:55,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:55,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:44:55,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963232470] [2020-10-26 19:44:55,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:44:55,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:55,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:44:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:44:55,645 INFO L87 Difference]: Start difference. First operand 283 states and 321 transitions. Second operand 41 states. [2020-10-26 19:44:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:56,903 INFO L93 Difference]: Finished difference Result 494 states and 572 transitions. [2020-10-26 19:44:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:44:56,903 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 98 [2020-10-26 19:44:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:56,906 INFO L225 Difference]: With dead ends: 494 [2020-10-26 19:44:56,906 INFO L226 Difference]: Without dead ends: 292 [2020-10-26 19:44:56,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:44:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-26 19:44:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2020-10-26 19:44:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-26 19:44:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 329 transitions. [2020-10-26 19:44:56,920 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 329 transitions. Word has length 98 [2020-10-26 19:44:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:56,920 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 329 transitions. [2020-10-26 19:44:56,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:44:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 329 transitions. [2020-10-26 19:44:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:44:56,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:56,921 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:56,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:44:56,922 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:56,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1070723907, now seen corresponding path program 38 times [2020-10-26 19:44:56,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:56,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558577518] [2020-10-26 19:44:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:44:57,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:57,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:44:57,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:58,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:58,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:58,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:58,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:58,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:58,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:44:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:58,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:58,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558577518] [2020-10-26 19:44:58,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:58,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:44:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066505433] [2020-10-26 19:44:58,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:44:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:58,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:44:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:44:58,834 INFO L87 Difference]: Start difference. First operand 290 states and 329 transitions. Second operand 42 states. [2020-10-26 19:45:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:00,118 INFO L93 Difference]: Finished difference Result 506 states and 586 transitions. [2020-10-26 19:45:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:45:00,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 100 [2020-10-26 19:45:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:00,120 INFO L225 Difference]: With dead ends: 506 [2020-10-26 19:45:00,120 INFO L226 Difference]: Without dead ends: 299 [2020-10-26 19:45:00,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:45:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-26 19:45:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2020-10-26 19:45:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-26 19:45:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 337 transitions. [2020-10-26 19:45:00,135 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 337 transitions. Word has length 100 [2020-10-26 19:45:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:00,135 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 337 transitions. [2020-10-26 19:45:00,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:45:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 337 transitions. [2020-10-26 19:45:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:45:00,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:00,136 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:00,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:45:00,136 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash 982365157, now seen corresponding path program 39 times [2020-10-26 19:45:00,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:00,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999708327] [2020-10-26 19:45:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:01,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:45:01,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:01,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-26 19:45:01,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:01,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:45:01,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:01,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:45:01,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:01,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:01,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:01,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:01,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:01,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:01,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:01,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:45:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:01,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:01,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:01,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:01,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:01,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999708327] [2020-10-26 19:45:01,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:01,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:45:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497100499] [2020-10-26 19:45:01,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:45:01,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:45:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:45:01,994 INFO L87 Difference]: Start difference. First operand 297 states and 337 transitions. Second operand 43 states. [2020-10-26 19:45:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:03,200 INFO L93 Difference]: Finished difference Result 518 states and 600 transitions. [2020-10-26 19:45:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:45:03,201 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2020-10-26 19:45:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:03,203 INFO L225 Difference]: With dead ends: 518 [2020-10-26 19:45:03,203 INFO L226 Difference]: Without dead ends: 306 [2020-10-26 19:45:03,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:45:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-26 19:45:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-10-26 19:45:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-26 19:45:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2020-10-26 19:45:03,217 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 102 [2020-10-26 19:45:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:03,217 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2020-10-26 19:45:03,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:45:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2020-10-26 19:45:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:45:03,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:03,218 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:03,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:45:03,218 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1968952327, now seen corresponding path program 40 times [2020-10-26 19:45:03,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:03,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007162823] [2020-10-26 19:45:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:03,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:45:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:05,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:05,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:05,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:05,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:05,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:05,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:05,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:05,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:45:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:05,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:05,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:05,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:05,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:05,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:05,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:05,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007162823] [2020-10-26 19:45:05,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:05,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:45:05,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772239025] [2020-10-26 19:45:05,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:45:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:45:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:45:05,272 INFO L87 Difference]: Start difference. First operand 304 states and 345 transitions. Second operand 44 states. [2020-10-26 19:45:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:06,588 INFO L93 Difference]: Finished difference Result 530 states and 614 transitions. [2020-10-26 19:45:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:45:06,588 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 104 [2020-10-26 19:45:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:06,590 INFO L225 Difference]: With dead ends: 530 [2020-10-26 19:45:06,590 INFO L226 Difference]: Without dead ends: 313 [2020-10-26 19:45:06,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:45:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-26 19:45:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2020-10-26 19:45:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-26 19:45:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 353 transitions. [2020-10-26 19:45:06,608 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 353 transitions. Word has length 104 [2020-10-26 19:45:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:06,608 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 353 transitions. [2020-10-26 19:45:06,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:45:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 353 transitions. [2020-10-26 19:45:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:45:06,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:06,610 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:06,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:45:06,610 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 891450281, now seen corresponding path program 41 times [2020-10-26 19:45:06,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:06,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005320608] [2020-10-26 19:45:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:07,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:45:07,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:07,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-26 19:45:07,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:45:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:45:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:08,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:08,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:08,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:08,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:08,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-26 19:45:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:08,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:08,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:08,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005320608] [2020-10-26 19:45:08,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:08,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:45:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993512726] [2020-10-26 19:45:08,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:45:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:45:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:45:08,791 INFO L87 Difference]: Start difference. First operand 311 states and 353 transitions. Second operand 45 states. [2020-10-26 19:45:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:10,069 INFO L93 Difference]: Finished difference Result 542 states and 628 transitions. [2020-10-26 19:45:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:45:10,070 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 106 [2020-10-26 19:45:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:10,072 INFO L225 Difference]: With dead ends: 542 [2020-10-26 19:45:10,072 INFO L226 Difference]: Without dead ends: 320 [2020-10-26 19:45:10,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:45:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-26 19:45:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 318. [2020-10-26 19:45:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-26 19:45:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 361 transitions. [2020-10-26 19:45:10,088 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 361 transitions. Word has length 106 [2020-10-26 19:45:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:10,088 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 361 transitions. [2020-10-26 19:45:10,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:45:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 361 transitions. [2020-10-26 19:45:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:45:10,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:10,090 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:10,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:45:10,090 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash 499102411, now seen corresponding path program 42 times [2020-10-26 19:45:10,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:10,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951802944] [2020-10-26 19:45:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:10,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:45:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:12,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:12,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:12,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:12,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:45:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:12,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:12,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:12,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:12,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:12,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951802944] [2020-10-26 19:45:12,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:12,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:45:12,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112185545] [2020-10-26 19:45:12,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:45:12,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:45:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:45:12,331 INFO L87 Difference]: Start difference. First operand 318 states and 361 transitions. Second operand 46 states. [2020-10-26 19:45:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:13,879 INFO L93 Difference]: Finished difference Result 554 states and 642 transitions. [2020-10-26 19:45:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:45:13,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2020-10-26 19:45:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:13,882 INFO L225 Difference]: With dead ends: 554 [2020-10-26 19:45:13,882 INFO L226 Difference]: Without dead ends: 327 [2020-10-26 19:45:13,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:45:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-26 19:45:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2020-10-26 19:45:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-26 19:45:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 369 transitions. [2020-10-26 19:45:13,898 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 369 transitions. Word has length 108 [2020-10-26 19:45:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:13,899 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 369 transitions. [2020-10-26 19:45:13,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:45:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 369 transitions. [2020-10-26 19:45:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:45:13,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:13,900 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:13,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:45:13,900 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1409921389, now seen corresponding path program 43 times [2020-10-26 19:45:13,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:13,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783135738] [2020-10-26 19:45:13,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:13,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:45:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:16,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:45:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:16,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:16,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:16,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:16,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:16,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 2 proven. 1849 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:16,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783135738] [2020-10-26 19:45:16,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:16,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:45:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987426664] [2020-10-26 19:45:16,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:45:16,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:45:16,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:45:16,232 INFO L87 Difference]: Start difference. First operand 325 states and 369 transitions. Second operand 47 states. [2020-10-26 19:45:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:17,431 INFO L93 Difference]: Finished difference Result 566 states and 656 transitions. [2020-10-26 19:45:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:45:17,432 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 110 [2020-10-26 19:45:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:17,435 INFO L225 Difference]: With dead ends: 566 [2020-10-26 19:45:17,435 INFO L226 Difference]: Without dead ends: 334 [2020-10-26 19:45:17,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:45:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-26 19:45:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2020-10-26 19:45:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-26 19:45:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 377 transitions. [2020-10-26 19:45:17,449 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 377 transitions. Word has length 110 [2020-10-26 19:45:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:17,449 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 377 transitions. [2020-10-26 19:45:17,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:45:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 377 transitions. [2020-10-26 19:45:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:45:17,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:17,450 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:17,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:45:17,451 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash 533630863, now seen corresponding path program 44 times [2020-10-26 19:45:17,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:17,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476568026] [2020-10-26 19:45:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:17,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:18,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:18,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:45:18,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:18,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-26 19:45:18,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:45:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:45:18,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:19,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:19,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:19,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:45:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:19,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:19,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:19,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:19,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:19,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:19,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:19,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 1936 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:19,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476568026] [2020-10-26 19:45:19,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:19,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:45:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857884453] [2020-10-26 19:45:19,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:45:19,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:19,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:45:19,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:45:19,875 INFO L87 Difference]: Start difference. First operand 332 states and 377 transitions. Second operand 48 states. [2020-10-26 19:45:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:21,201 INFO L93 Difference]: Finished difference Result 578 states and 670 transitions. [2020-10-26 19:45:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:45:21,202 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 112 [2020-10-26 19:45:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:21,205 INFO L225 Difference]: With dead ends: 578 [2020-10-26 19:45:21,205 INFO L226 Difference]: Without dead ends: 341 [2020-10-26 19:45:21,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:45:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-26 19:45:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 339. [2020-10-26 19:45:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-26 19:45:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 385 transitions. [2020-10-26 19:45:21,219 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 385 transitions. Word has length 112 [2020-10-26 19:45:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:21,220 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 385 transitions. [2020-10-26 19:45:21,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:45:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 385 transitions. [2020-10-26 19:45:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:45:21,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:21,221 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:21,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:45:21,221 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:21,221 INFO L82 PathProgramCache]: Analyzing trace with hash 232025393, now seen corresponding path program 45 times [2020-10-26 19:45:21,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:21,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136689857] [2020-10-26 19:45:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:21,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:22,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:22,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:45:22,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:22,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-26 19:45:22,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:45:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:45:22,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:23,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:23,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:23,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:23,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:23,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:23,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:23,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:23,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:23,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:23,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:23,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 19:45:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:23,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:23,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:23,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136689857] [2020-10-26 19:45:23,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:23,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:45:23,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871037376] [2020-10-26 19:45:23,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:45:23,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:23,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:45:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:45:23,723 INFO L87 Difference]: Start difference. First operand 339 states and 385 transitions. Second operand 49 states. [2020-10-26 19:45:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:25,010 INFO L93 Difference]: Finished difference Result 590 states and 684 transitions. [2020-10-26 19:45:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:45:25,010 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 114 [2020-10-26 19:45:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:25,014 INFO L225 Difference]: With dead ends: 590 [2020-10-26 19:45:25,014 INFO L226 Difference]: Without dead ends: 348 [2020-10-26 19:45:25,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:45:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-26 19:45:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 346. [2020-10-26 19:45:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-26 19:45:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 393 transitions. [2020-10-26 19:45:25,028 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 393 transitions. Word has length 114 [2020-10-26 19:45:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:25,029 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 393 transitions. [2020-10-26 19:45:25,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:45:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 393 transitions. [2020-10-26 19:45:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:45:25,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:25,030 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:25,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:45:25,030 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1848022445, now seen corresponding path program 46 times [2020-10-26 19:45:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:25,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630614929] [2020-10-26 19:45:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:25,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:45:26,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:27,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:27,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:27,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:27,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:45:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:27,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:27,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:27,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:27,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:27,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:27,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:27,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630614929] [2020-10-26 19:45:27,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:27,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:45:27,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158217141] [2020-10-26 19:45:27,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:45:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:45:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:45:27,592 INFO L87 Difference]: Start difference. First operand 346 states and 393 transitions. Second operand 50 states. [2020-10-26 19:45:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:29,216 INFO L93 Difference]: Finished difference Result 602 states and 698 transitions. [2020-10-26 19:45:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:45:29,217 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 116 [2020-10-26 19:45:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:29,219 INFO L225 Difference]: With dead ends: 602 [2020-10-26 19:45:29,219 INFO L226 Difference]: Without dead ends: 355 [2020-10-26 19:45:29,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:45:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-26 19:45:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2020-10-26 19:45:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-26 19:45:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 401 transitions. [2020-10-26 19:45:29,234 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 401 transitions. Word has length 116 [2020-10-26 19:45:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:29,234 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 401 transitions. [2020-10-26 19:45:29,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:45:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 401 transitions. [2020-10-26 19:45:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:45:29,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:29,235 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:29,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:45:29,235 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 680765173, now seen corresponding path program 47 times [2020-10-26 19:45:29,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:29,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272578259] [2020-10-26 19:45:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:30,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:45:30,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:31,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:31,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:31,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:31,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:31,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:31,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:31,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 19:45:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:31,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:31,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:31,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:31,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:31,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:31,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:31,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:31,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272578259] [2020-10-26 19:45:31,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:31,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:45:31,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660105285] [2020-10-26 19:45:31,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:45:31,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:45:31,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:45:31,926 INFO L87 Difference]: Start difference. First operand 353 states and 401 transitions. Second operand 51 states. [2020-10-26 19:45:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:33,481 INFO L93 Difference]: Finished difference Result 614 states and 712 transitions. [2020-10-26 19:45:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:45:33,482 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 118 [2020-10-26 19:45:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:33,484 INFO L225 Difference]: With dead ends: 614 [2020-10-26 19:45:33,485 INFO L226 Difference]: Without dead ends: 362 [2020-10-26 19:45:33,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:45:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-26 19:45:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-10-26 19:45:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-26 19:45:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 409 transitions. [2020-10-26 19:45:33,497 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 409 transitions. Word has length 118 [2020-10-26 19:45:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:33,498 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 409 transitions. [2020-10-26 19:45:33,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:45:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 409 transitions. [2020-10-26 19:45:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:45:33,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:33,499 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:33,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:45:33,499 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -105823465, now seen corresponding path program 48 times [2020-10-26 19:45:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:33,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434596063] [2020-10-26 19:45:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:33,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:45:34,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:36,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:36,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:36,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-26 19:45:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:36,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:36,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:36,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:36,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:36,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:36,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:36,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:36,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434596063] [2020-10-26 19:45:36,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:36,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:45:36,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145562706] [2020-10-26 19:45:36,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:45:36,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:45:36,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:45:36,391 INFO L87 Difference]: Start difference. First operand 360 states and 409 transitions. Second operand 52 states. [2020-10-26 19:45:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:38,018 INFO L93 Difference]: Finished difference Result 626 states and 726 transitions. [2020-10-26 19:45:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:45:38,019 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2020-10-26 19:45:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:38,021 INFO L225 Difference]: With dead ends: 626 [2020-10-26 19:45:38,021 INFO L226 Difference]: Without dead ends: 369 [2020-10-26 19:45:38,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:45:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-26 19:45:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2020-10-26 19:45:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-26 19:45:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 417 transitions. [2020-10-26 19:45:38,034 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 417 transitions. Word has length 120 [2020-10-26 19:45:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:38,034 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 417 transitions. [2020-10-26 19:45:38,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:45:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 417 transitions. [2020-10-26 19:45:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:45:38,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:38,035 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:38,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:45:38,035 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash -103260487, now seen corresponding path program 49 times [2020-10-26 19:45:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:38,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618169739] [2020-10-26 19:45:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:38,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:39,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:39,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:45:39,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:39,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-26 19:45:39,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:45:39,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:39,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:45:39,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:40,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:40,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:40,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:40,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:40,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:40,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:40,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:40,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:40,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:40,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:40,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:45:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:40,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:40,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 2401 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:40,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618169739] [2020-10-26 19:45:40,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:40,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:45:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871199800] [2020-10-26 19:45:40,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:45:40,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:45:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:45:40,995 INFO L87 Difference]: Start difference. First operand 367 states and 417 transitions. Second operand 53 states. [2020-10-26 19:45:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:43,019 INFO L93 Difference]: Finished difference Result 638 states and 740 transitions. [2020-10-26 19:45:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:45:43,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 122 [2020-10-26 19:45:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:43,022 INFO L225 Difference]: With dead ends: 638 [2020-10-26 19:45:43,022 INFO L226 Difference]: Without dead ends: 376 [2020-10-26 19:45:43,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:45:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-26 19:45:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2020-10-26 19:45:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-26 19:45:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 425 transitions. [2020-10-26 19:45:43,036 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 425 transitions. Word has length 122 [2020-10-26 19:45:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:43,037 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 425 transitions. [2020-10-26 19:45:43,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:45:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 425 transitions. [2020-10-26 19:45:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:45:43,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:43,038 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:43,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:45:43,038 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1935205925, now seen corresponding path program 50 times [2020-10-26 19:45:43,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:43,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118031864] [2020-10-26 19:45:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:43,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:44,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:44,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:45:44,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:44,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-26 19:45:44,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:45:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:45:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:46,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:46,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:46,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:46,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-26 19:45:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:46,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:46,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118031864] [2020-10-26 19:45:46,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:46,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:45:46,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913427185] [2020-10-26 19:45:46,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:45:46,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:46,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:45:46,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:45:46,343 INFO L87 Difference]: Start difference. First operand 374 states and 425 transitions. Second operand 54 states. [2020-10-26 19:45:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:48,292 INFO L93 Difference]: Finished difference Result 650 states and 754 transitions. [2020-10-26 19:45:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:45:48,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 124 [2020-10-26 19:45:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:48,295 INFO L225 Difference]: With dead ends: 650 [2020-10-26 19:45:48,295 INFO L226 Difference]: Without dead ends: 383 [2020-10-26 19:45:48,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:45:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-26 19:45:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2020-10-26 19:45:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-26 19:45:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 433 transitions. [2020-10-26 19:45:48,308 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 433 transitions. Word has length 124 [2020-10-26 19:45:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:48,308 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 433 transitions. [2020-10-26 19:45:48,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:45:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 433 transitions. [2020-10-26 19:45:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 19:45:48,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:48,309 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:48,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-26 19:45:48,309 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1498180483, now seen corresponding path program 51 times [2020-10-26 19:45:48,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:48,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789614442] [2020-10-26 19:45:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:48,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 19:45:49,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:51,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:51,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:51,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:51,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:51,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:51,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:51,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:51,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-26 19:45:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:51,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:51,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:51,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 2 proven. 2601 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:51,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789614442] [2020-10-26 19:45:51,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:51,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:45:51,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419843620] [2020-10-26 19:45:51,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:45:51,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:45:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:45:51,427 INFO L87 Difference]: Start difference. First operand 381 states and 433 transitions. Second operand 55 states. [2020-10-26 19:45:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:53,484 INFO L93 Difference]: Finished difference Result 662 states and 768 transitions. [2020-10-26 19:45:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:45:53,485 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 126 [2020-10-26 19:45:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:53,488 INFO L225 Difference]: With dead ends: 662 [2020-10-26 19:45:53,488 INFO L226 Difference]: Without dead ends: 390 [2020-10-26 19:45:53,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:45:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-26 19:45:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2020-10-26 19:45:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-26 19:45:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 441 transitions. [2020-10-26 19:45:53,503 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 441 transitions. Word has length 126 [2020-10-26 19:45:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:53,503 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 441 transitions. [2020-10-26 19:45:53,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:45:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 441 transitions. [2020-10-26 19:45:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:45:53,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:53,505 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:53,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-26 19:45:53,505 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1871441567, now seen corresponding path program 52 times [2020-10-26 19:45:53,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:53,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809326244] [2020-10-26 19:45:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:55,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 19:45:55,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:56,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:45:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:56,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:56,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:56,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:56,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:56,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:56,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2708 backedges. 2 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:45:56,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809326244] [2020-10-26 19:45:56,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:56,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-26 19:45:56,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158029000] [2020-10-26 19:45:56,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-26 19:45:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-26 19:45:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:45:56,837 INFO L87 Difference]: Start difference. First operand 388 states and 441 transitions. Second operand 56 states. [2020-10-26 19:45:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:58,989 INFO L93 Difference]: Finished difference Result 674 states and 782 transitions. [2020-10-26 19:45:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:45:58,990 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 128 [2020-10-26 19:45:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:58,992 INFO L225 Difference]: With dead ends: 674 [2020-10-26 19:45:58,992 INFO L226 Difference]: Without dead ends: 397 [2020-10-26 19:45:58,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:45:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-26 19:45:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-10-26 19:45:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-26 19:45:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 449 transitions. [2020-10-26 19:45:59,004 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 449 transitions. Word has length 128 [2020-10-26 19:45:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:59,005 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 449 transitions. [2020-10-26 19:45:59,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-26 19:45:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 449 transitions. [2020-10-26 19:45:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:45:59,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:59,006 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:59,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-26 19:45:59,007 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:59,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1672890433, now seen corresponding path program 53 times [2020-10-26 19:45:59,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:59,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052775595] [2020-10-26 19:45:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:59,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:00,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:00,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 19:46:00,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:00,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1596 [2020-10-26 19:46:00,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-26 19:46:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 19:46:00,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:02,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:02,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:02,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:02,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:02,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:02,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:02,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:02,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:02,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:02,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:02,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:02,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-26 19:46:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:02,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:46:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 2 proven. 2809 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:02,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052775595] [2020-10-26 19:46:02,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:02,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:46:02,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180409189] [2020-10-26 19:46:02,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:46:02,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:02,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:46:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:46:02,503 INFO L87 Difference]: Start difference. First operand 395 states and 449 transitions. Second operand 57 states. [2020-10-26 19:46:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:04,859 INFO L93 Difference]: Finished difference Result 686 states and 796 transitions. [2020-10-26 19:46:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:46:04,860 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 130 [2020-10-26 19:46:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:04,863 INFO L225 Difference]: With dead ends: 686 [2020-10-26 19:46:04,863 INFO L226 Difference]: Without dead ends: 404 [2020-10-26 19:46:04,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:46:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-26 19:46:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2020-10-26 19:46:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-26 19:46:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 457 transitions. [2020-10-26 19:46:04,878 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 457 transitions. Word has length 130 [2020-10-26 19:46:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:04,879 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 457 transitions. [2020-10-26 19:46:04,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:46:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 457 transitions. [2020-10-26 19:46:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:46:04,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:04,880 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:04,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-26 19:46:04,880 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -156188317, now seen corresponding path program 54 times [2020-10-26 19:46:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:04,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368210512] [2020-10-26 19:46:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:04,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:06,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:06,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1669 [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 19:46:06,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:08,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:08,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:08,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-26 19:46:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:08,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:08,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:08,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:08,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:08,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:46:08,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:08,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2920 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:08,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368210512] [2020-10-26 19:46:08,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:08,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-26 19:46:08,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657066729] [2020-10-26 19:46:08,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-26 19:46:08,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-26 19:46:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:46:08,497 INFO L87 Difference]: Start difference. First operand 402 states and 457 transitions. Second operand 58 states. [2020-10-26 19:46:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:10,822 INFO L93 Difference]: Finished difference Result 698 states and 810 transitions. [2020-10-26 19:46:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-26 19:46:10,823 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 132 [2020-10-26 19:46:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:10,825 INFO L225 Difference]: With dead ends: 698 [2020-10-26 19:46:10,825 INFO L226 Difference]: Without dead ends: 411 [2020-10-26 19:46:10,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:46:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-26 19:46:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2020-10-26 19:46:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-26 19:46:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 465 transitions. [2020-10-26 19:46:10,838 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 465 transitions. Word has length 132 [2020-10-26 19:46:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:10,838 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 465 transitions. [2020-10-26 19:46:10,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-26 19:46:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 465 transitions. [2020-10-26 19:46:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-26 19:46:10,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:10,840 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:10,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-26 19:46:10,840 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1259243003, now seen corresponding path program 55 times [2020-10-26 19:46:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:10,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109356215] [2020-10-26 19:46:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:10,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:12,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1576 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 19:46:12,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:14,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:14,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:14,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:46:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:14,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 2 proven. 3025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:14,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109356215] [2020-10-26 19:46:14,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:14,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:46:14,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707786758] [2020-10-26 19:46:14,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:46:14,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:46:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:46:14,405 INFO L87 Difference]: Start difference. First operand 409 states and 465 transitions. Second operand 59 states. [2020-10-26 19:46:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:16,429 INFO L93 Difference]: Finished difference Result 710 states and 824 transitions. [2020-10-26 19:46:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:46:16,430 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 134 [2020-10-26 19:46:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:16,432 INFO L225 Difference]: With dead ends: 710 [2020-10-26 19:46:16,432 INFO L226 Difference]: Without dead ends: 418 [2020-10-26 19:46:16,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:46:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-26 19:46:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2020-10-26 19:46:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-26 19:46:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 473 transitions. [2020-10-26 19:46:16,445 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 473 transitions. Word has length 134 [2020-10-26 19:46:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:16,446 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 473 transitions. [2020-10-26 19:46:16,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:46:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 473 transitions. [2020-10-26 19:46:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-26 19:46:16,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:16,447 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:16,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-26 19:46:16,447 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -437874137, now seen corresponding path program 56 times [2020-10-26 19:46:16,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:16,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382177259] [2020-10-26 19:46:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:16,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:18,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 19:46:18,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:20,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:20,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:20,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-26 19:46:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:20,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:20,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:20,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:20,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3140 backedges. 2 proven. 3136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:20,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382177259] [2020-10-26 19:46:20,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:20,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-26 19:46:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392488660] [2020-10-26 19:46:20,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-26 19:46:20,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-26 19:46:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:46:20,188 INFO L87 Difference]: Start difference. First operand 416 states and 473 transitions. Second operand 60 states. [2020-10-26 19:46:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:22,474 INFO L93 Difference]: Finished difference Result 722 states and 838 transitions. [2020-10-26 19:46:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:46:22,475 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 136 [2020-10-26 19:46:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:22,477 INFO L225 Difference]: With dead ends: 722 [2020-10-26 19:46:22,477 INFO L226 Difference]: Without dead ends: 425 [2020-10-26 19:46:22,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:46:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-26 19:46:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2020-10-26 19:46:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-10-26 19:46:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 481 transitions. [2020-10-26 19:46:22,493 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 481 transitions. Word has length 136 [2020-10-26 19:46:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:22,494 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 481 transitions. [2020-10-26 19:46:22,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-26 19:46:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 481 transitions. [2020-10-26 19:46:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:46:22,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:22,495 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:22,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-26 19:46:22,495 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1376376375, now seen corresponding path program 57 times [2020-10-26 19:46:22,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:22,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690769207] [2020-10-26 19:46:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:24,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:24,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 19:46:24,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1862 [2020-10-26 19:46:24,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-26 19:46:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 19:46:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:26,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:26,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:26,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:26,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:26,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:26,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-26 19:46:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:26,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 2 proven. 3249 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690769207] [2020-10-26 19:46:26,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:26,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:46:26,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888121212] [2020-10-26 19:46:26,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:46:26,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:26,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:46:26,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:46:26,540 INFO L87 Difference]: Start difference. First operand 423 states and 481 transitions. Second operand 61 states. [2020-10-26 19:46:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:28,969 INFO L93 Difference]: Finished difference Result 734 states and 852 transitions. [2020-10-26 19:46:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:46:28,970 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 138 [2020-10-26 19:46:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:28,973 INFO L225 Difference]: With dead ends: 734 [2020-10-26 19:46:28,973 INFO L226 Difference]: Without dead ends: 432 [2020-10-26 19:46:28,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:46:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-26 19:46:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-10-26 19:46:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-26 19:46:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 489 transitions. [2020-10-26 19:46:28,985 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 489 transitions. Word has length 138 [2020-10-26 19:46:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:28,986 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 489 transitions. [2020-10-26 19:46:28,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-26 19:46:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 489 transitions. [2020-10-26 19:46:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-26 19:46:28,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:28,987 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:28,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-26 19:46:28,987 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1333894933, now seen corresponding path program 58 times [2020-10-26 19:46:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907193614] [2020-10-26 19:46:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:30,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:30,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:46:30,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:30,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-26 19:46:30,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:30,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-26 19:46:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 19:46:30,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:33,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:46:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:33,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 2 proven. 3364 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:33,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907193614] [2020-10-26 19:46:33,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:33,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-26 19:46:33,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168213325] [2020-10-26 19:46:33,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-26 19:46:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:33,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-26 19:46:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:46:33,064 INFO L87 Difference]: Start difference. First operand 430 states and 489 transitions. Second operand 62 states. [2020-10-26 19:46:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:35,106 INFO L93 Difference]: Finished difference Result 746 states and 866 transitions. [2020-10-26 19:46:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-26 19:46:35,107 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 140 [2020-10-26 19:46:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:35,110 INFO L225 Difference]: With dead ends: 746 [2020-10-26 19:46:35,111 INFO L226 Difference]: Without dead ends: 439 [2020-10-26 19:46:35,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:46:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-26 19:46:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 437. [2020-10-26 19:46:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-26 19:46:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 497 transitions. [2020-10-26 19:46:35,124 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 497 transitions. Word has length 140 [2020-10-26 19:46:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:35,124 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 497 transitions. [2020-10-26 19:46:35,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-26 19:46:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 497 transitions. [2020-10-26 19:46:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 19:46:35,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:35,126 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:35,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-26 19:46:35,126 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash 836065165, now seen corresponding path program 59 times [2020-10-26 19:46:35,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:35,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448366214] [2020-10-26 19:46:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:35,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:37,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:37,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1926 [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-26 19:46:37,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:39,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:39,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:39,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:39,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:39,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:46:39,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:39,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-26 19:46:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:39,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:39,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3485 backedges. 2 proven. 3481 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:39,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448366214] [2020-10-26 19:46:39,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:39,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:46:39,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073122038] [2020-10-26 19:46:39,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:46:39,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:46:39,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:46:39,386 INFO L87 Difference]: Start difference. First operand 437 states and 497 transitions. Second operand 63 states. [2020-10-26 19:46:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:42,082 INFO L93 Difference]: Finished difference Result 758 states and 880 transitions. [2020-10-26 19:46:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:46:42,083 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 142 [2020-10-26 19:46:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:42,085 INFO L225 Difference]: With dead ends: 758 [2020-10-26 19:46:42,085 INFO L226 Difference]: Without dead ends: 446 [2020-10-26 19:46:42,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:46:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-26 19:46:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2020-10-26 19:46:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-26 19:46:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 505 transitions. [2020-10-26 19:46:42,096 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 505 transitions. Word has length 142 [2020-10-26 19:46:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:42,096 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 505 transitions. [2020-10-26 19:46:42,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-26 19:46:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 505 transitions. [2020-10-26 19:46:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-26 19:46:42,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:42,097 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:42,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-26 19:46:42,097 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1186386513, now seen corresponding path program 60 times [2020-10-26 19:46:42,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:42,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575212577] [2020-10-26 19:46:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:42,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2026 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 19:46:44,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:46,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:46,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:46,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:46,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-26 19:46:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:46,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:46,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:46,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:46,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 2 proven. 3600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:46,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575212577] [2020-10-26 19:46:46,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:46,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-26 19:46:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908645704] [2020-10-26 19:46:46,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-26 19:46:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-26 19:46:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:46:46,490 INFO L87 Difference]: Start difference. First operand 444 states and 505 transitions. Second operand 64 states. [2020-10-26 19:46:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:49,234 INFO L93 Difference]: Finished difference Result 770 states and 894 transitions. [2020-10-26 19:46:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-26 19:46:49,235 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 144 [2020-10-26 19:46:49,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:49,237 INFO L225 Difference]: With dead ends: 770 [2020-10-26 19:46:49,237 INFO L226 Difference]: Without dead ends: 453 [2020-10-26 19:46:49,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:46:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-26 19:46:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2020-10-26 19:46:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-26 19:46:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 513 transitions. [2020-10-26 19:46:49,249 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 513 transitions. Word has length 144 [2020-10-26 19:46:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:49,250 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 513 transitions. [2020-10-26 19:46:49,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-26 19:46:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 513 transitions. [2020-10-26 19:46:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:46:49,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:49,251 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:49,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-26 19:46:49,251 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash 857736017, now seen corresponding path program 61 times [2020-10-26 19:46:49,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:49,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305460268] [2020-10-26 19:46:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2084 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 19:46:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:53,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:53,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:46:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:53,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:53,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:53,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:46:53,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:53,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:46:53,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:46:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:53,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 2 proven. 3721 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305460268] [2020-10-26 19:46:53,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:53,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-26 19:46:53,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977546523] [2020-10-26 19:46:53,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-26 19:46:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:53,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-26 19:46:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 19:46:53,964 INFO L87 Difference]: Start difference. First operand 451 states and 513 transitions. Second operand 65 states. [2020-10-26 19:46:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:56,850 INFO L93 Difference]: Finished difference Result 782 states and 908 transitions. [2020-10-26 19:46:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-26 19:46:56,850 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2020-10-26 19:46:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:56,853 INFO L225 Difference]: With dead ends: 782 [2020-10-26 19:46:56,853 INFO L226 Difference]: Without dead ends: 460 [2020-10-26 19:46:56,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 19:46:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-26 19:46:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2020-10-26 19:46:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-26 19:46:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 521 transitions. [2020-10-26 19:46:56,865 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 521 transitions. Word has length 146 [2020-10-26 19:46:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:56,866 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 521 transitions. [2020-10-26 19:46:56,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-26 19:46:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 521 transitions. [2020-10-26 19:46:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-26 19:46:56,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:56,867 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:56,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-26 19:46:56,867 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1835534221, now seen corresponding path program 62 times [2020-10-26 19:46:56,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:56,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530684849] [2020-10-26 19:46:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:59,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2173 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 19:46:59,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:01,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:01,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:01,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:01,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:01,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:47:01,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:01,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:01,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-26 19:47:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:01,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:01,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:01,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:47:01,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:01,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:47:01,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:47:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:01,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 2 proven. 3844 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:47:01,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530684849] [2020-10-26 19:47:01,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:01,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-26 19:47:01,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882583132] [2020-10-26 19:47:01,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-26 19:47:01,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-26 19:47:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:47:01,662 INFO L87 Difference]: Start difference. First operand 458 states and 521 transitions. Second operand 66 states. [2020-10-26 19:47:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:03,979 INFO L93 Difference]: Finished difference Result 794 states and 922 transitions. [2020-10-26 19:47:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-26 19:47:03,980 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 148 [2020-10-26 19:47:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:03,983 INFO L225 Difference]: With dead ends: 794 [2020-10-26 19:47:03,983 INFO L226 Difference]: Without dead ends: 467 [2020-10-26 19:47:03,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:47:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-26 19:47:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2020-10-26 19:47:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-26 19:47:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 529 transitions. [2020-10-26 19:47:03,996 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 529 transitions. Word has length 148 [2020-10-26 19:47:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:03,996 INFO L481 AbstractCegarLoop]: Abstraction has 465 states and 529 transitions. [2020-10-26 19:47:03,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-26 19:47:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 529 transitions. [2020-10-26 19:47:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-26 19:47:03,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:03,997 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:03,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-26 19:47:03,998 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash -202953451, now seen corresponding path program 63 times [2020-10-26 19:47:03,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:03,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550215986] [2020-10-26 19:47:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:04,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2181 [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-26 19:47:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:06,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 19:47:06,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:08,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:08,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:08,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:08,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:08,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:08,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:08,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:08,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:08,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-26 19:47:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:08,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:08,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 2 proven. 3969 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:47:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550215986] [2020-10-26 19:47:08,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:08,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-26 19:47:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137750754] [2020-10-26 19:47:08,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-26 19:47:08,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-26 19:47:08,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-26 19:47:08,924 INFO L87 Difference]: Start difference. First operand 465 states and 529 transitions. Second operand 67 states. [2020-10-26 19:47:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:12,011 INFO L93 Difference]: Finished difference Result 806 states and 936 transitions. [2020-10-26 19:47:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-26 19:47:12,011 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 150 [2020-10-26 19:47:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:12,014 INFO L225 Difference]: With dead ends: 806 [2020-10-26 19:47:12,014 INFO L226 Difference]: Without dead ends: 474 [2020-10-26 19:47:12,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-26 19:47:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-26 19:47:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 472. [2020-10-26 19:47:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-10-26 19:47:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 537 transitions. [2020-10-26 19:47:12,025 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 537 transitions. Word has length 150 [2020-10-26 19:47:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:12,025 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 537 transitions. [2020-10-26 19:47:12,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-26 19:47:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 537 transitions. [2020-10-26 19:47:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-26 19:47:12,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:12,026 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:12,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-26 19:47:12,026 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:12,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1044103479, now seen corresponding path program 64 times [2020-10-26 19:47:12,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:12,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519667072] [2020-10-26 19:47:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:12,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:14,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:14,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2231 [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 19:47:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:17,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:17,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:17,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:17,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:17,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:17,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:17,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:17,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:17,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:47:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:17,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 2 proven. 4096 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:47:17,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519667072] [2020-10-26 19:47:17,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:17,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-26 19:47:17,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146646582] [2020-10-26 19:47:17,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-26 19:47:17,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:17,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-26 19:47:17,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-26 19:47:17,149 INFO L87 Difference]: Start difference. First operand 472 states and 537 transitions. Second operand 68 states. [2020-10-26 19:47:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:20,145 INFO L93 Difference]: Finished difference Result 818 states and 950 transitions. [2020-10-26 19:47:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-26 19:47:20,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 152 [2020-10-26 19:47:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:20,147 INFO L225 Difference]: With dead ends: 818 [2020-10-26 19:47:20,148 INFO L226 Difference]: Without dead ends: 481 [2020-10-26 19:47:20,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-26 19:47:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-26 19:47:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2020-10-26 19:47:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-26 19:47:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 545 transitions. [2020-10-26 19:47:20,159 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 545 transitions. Word has length 152 [2020-10-26 19:47:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 545 transitions. [2020-10-26 19:47:20,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-26 19:47:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 545 transitions. [2020-10-26 19:47:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:47:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:20,161 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:20,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-26 19:47:20,161 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1169937625, now seen corresponding path program 65 times [2020-10-26 19:47:20,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:20,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386997369] [2020-10-26 19:47:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:22,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2423 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 19:47:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:25,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:25,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:25,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 19:47:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:25,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:25,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 2 proven. 4225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:47:25,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386997369] [2020-10-26 19:47:25,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:25,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-26 19:47:25,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815054370] [2020-10-26 19:47:25,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-26 19:47:25,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-26 19:47:25,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:47:25,587 INFO L87 Difference]: Start difference. First operand 479 states and 545 transitions. Second operand 69 states. [2020-10-26 19:47:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:28,030 INFO L93 Difference]: Finished difference Result 830 states and 964 transitions. [2020-10-26 19:47:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-26 19:47:28,031 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 154 [2020-10-26 19:47:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:28,033 INFO L225 Difference]: With dead ends: 830 [2020-10-26 19:47:28,033 INFO L226 Difference]: Without dead ends: 488 [2020-10-26 19:47:28,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:47:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-26 19:47:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 486. [2020-10-26 19:47:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-10-26 19:47:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 553 transitions. [2020-10-26 19:47:28,045 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 553 transitions. Word has length 154 [2020-10-26 19:47:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:28,045 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 553 transitions. [2020-10-26 19:47:28,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-26 19:47:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 553 transitions. [2020-10-26 19:47:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-26 19:47:28,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:28,046 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:28,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-26 19:47:28,046 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1837467643, now seen corresponding path program 66 times [2020-10-26 19:47:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949797792] [2020-10-26 19:47:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:28,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:30,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:30,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2500 [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-26 19:47:30,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:33,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:33,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:33,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:33,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:33,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:33,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:47:33,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:33,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:33,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:33,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:33,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:33,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-26 19:47:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:33,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:33,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:33,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 2 proven. 4356 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:47:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949797792] [2020-10-26 19:47:33,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:33,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-26 19:47:33,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037921154] [2020-10-26 19:47:33,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-26 19:47:33,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-26 19:47:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-26 19:47:33,680 INFO L87 Difference]: Start difference. First operand 486 states and 553 transitions. Second operand 70 states. [2020-10-26 19:47:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:36,408 INFO L93 Difference]: Finished difference Result 842 states and 978 transitions. [2020-10-26 19:47:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-26 19:47:36,409 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 156 [2020-10-26 19:47:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:36,411 INFO L225 Difference]: With dead ends: 842 [2020-10-26 19:47:36,412 INFO L226 Difference]: Without dead ends: 495 [2020-10-26 19:47:36,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-26 19:47:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-26 19:47:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2020-10-26 19:47:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-26 19:47:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 561 transitions. [2020-10-26 19:47:36,426 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 561 transitions. Word has length 156 [2020-10-26 19:47:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:36,426 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 561 transitions. [2020-10-26 19:47:36,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-26 19:47:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 561 transitions. [2020-10-26 19:47:36,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-26 19:47:36,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:36,428 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:36,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-26 19:47:36,428 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash -911279459, now seen corresponding path program 67 times [2020-10-26 19:47:36,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:36,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039507124] [2020-10-26 19:47:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:36,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking...