/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/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:52:59,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:52:59,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:52:59,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:52:59,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:52:59,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:52:59,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:52:59,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:52:59,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:52:59,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:52:59,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:52:59,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:52:59,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:52:59,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:52:59,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:52:59,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:52:59,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:52:59,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:52:59,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:52:59,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:52:59,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:52:59,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:52:59,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:52:59,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:52:59,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:52:59,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:52:59,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:52:59,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:52:59,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:52:59,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:52:59,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:52:59,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:52:59,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:52:59,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:52:59,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:52:59,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:52:59,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:52:59,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:52:59,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:52:59,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:52:59,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:52:59,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:52:59,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:52:59,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:52:59,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:52:59,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:52:59,509 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:52:59,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:52:59,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:52:59,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:52:59,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:52:59,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:52:59,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:52:59,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:52:59,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:52:59,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:52:59,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:52:59,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:52:59,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:52:59,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:52:59,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:52:59,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:52:59,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:52:59,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:52:59,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:52:59,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:52:59,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:52:59,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:52:59,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:52:59,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:52:59,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:52:59,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:52:59,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:52:59,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:52:59,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:52:59,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:52:59,943 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:52:59,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-27 05:53:00,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ca63d1a3/c578fadea8c44eb3a5a5065ade90e82f/FLAG7c9853c98 [2020-10-27 05:53:00,913 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:53:00,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-27 05:53:00,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ca63d1a3/c578fadea8c44eb3a5a5065ade90e82f/FLAG7c9853c98 [2020-10-27 05:53:01,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ca63d1a3/c578fadea8c44eb3a5a5065ade90e82f [2020-10-27 05:53:01,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:53:01,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:53:01,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:53:01,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:53:01,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:53:01,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:01,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba20cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01, skipping insertion in model container [2020-10-27 05:53:01,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:01,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:53:01,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:53:01,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:53:01,697 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:53:01,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:53:01,969 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:53:01,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01 WrapperNode [2020-10-27 05:53:01,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:53:01,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:53:01,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:53:01,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:53:01,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:01,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:02,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:02,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:02,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:02,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:02,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... [2020-10-27 05:53:02,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:53:02,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:53:02,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:53:02,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:53:02,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:53:02,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:53:02,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:53:02,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:53:02,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:53:02,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:53:02,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:53:02,220 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:53:02,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:53:02,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:53:02,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:53:02,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:53:02,221 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:53:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:53:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:53:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:53:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:53:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:53:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:53:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:53:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:53:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:53:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:53:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:53:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:53:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:53:02,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:53:02,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:53:02,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:53:02,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:53:02,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:53:03,705 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:53:03,705 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:53:03,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:03 BoogieIcfgContainer [2020-10-27 05:53:03,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:53:03,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:53:03,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:53:03,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:53:03,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:53:01" (1/3) ... [2020-10-27 05:53:03,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67e8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:03, skipping insertion in model container [2020-10-27 05:53:03,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:01" (2/3) ... [2020-10-27 05:53:03,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67e8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:03, skipping insertion in model container [2020-10-27 05:53:03,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:03" (3/3) ... [2020-10-27 05:53:03,718 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-27 05:53:03,732 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:53:03,738 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:53:03,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:53:03,784 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:53:03,784 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:53:03,784 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:53:03,784 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:53:03,785 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:53:03,785 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:53:03,785 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:53:03,785 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:53:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states. [2020-10-27 05:53:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:53:03,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:03,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:03,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:03,833 INFO L82 PathProgramCache]: Analyzing trace with hash -376386357, now seen corresponding path program 1 times [2020-10-27 05:53:03,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:03,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850968751] [2020-10-27 05:53:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:04,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:04,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:05,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:09,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:09,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:53:09,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:09,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:53:09,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:53:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:53:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:53:09,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:53:10,108 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:10,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:10,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:10,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:10,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:10,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:10,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:53:10,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:10,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:10,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:10,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850968751] [2020-10-27 05:53:10,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:10,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:53:10,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385291714] [2020-10-27 05:53:10,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:53:10,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:53:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:10,314 INFO L87 Difference]: Start difference. First operand 259 states. Second operand 9 states. [2020-10-27 05:53:13,041 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:53:13,456 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:53:13,881 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:14,311 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:53:14,766 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:53:15,259 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:53:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:16,594 INFO L93 Difference]: Finished difference Result 1145 states and 1884 transitions. [2020-10-27 05:53:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:53:16,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 101 [2020-10-27 05:53:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:16,632 INFO L225 Difference]: With dead ends: 1145 [2020-10-27 05:53:16,632 INFO L226 Difference]: Without dead ends: 958 [2020-10-27 05:53:16,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:53:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-10-27 05:53:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2020-10-27 05:53:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-10-27 05:53:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1431 transitions. [2020-10-27 05:53:16,839 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1431 transitions. Word has length 101 [2020-10-27 05:53:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:16,844 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 1431 transitions. [2020-10-27 05:53:16,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:53:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1431 transitions. [2020-10-27 05:53:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:53:16,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:16,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:16,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:53:16,864 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash 91829184, now seen corresponding path program 1 times [2020-10-27 05:53:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:16,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439188151] [2020-10-27 05:53:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:19,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:19,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:53:19,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:19,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2910 [2020-10-27 05:53:19,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:19,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:19,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:19,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:53:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:53:20,346 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:20,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:20,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:20,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:20,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:20,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:20,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:53:20,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:20,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:20,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:20,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:20,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439188151] [2020-10-27 05:53:20,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:20,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:20,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530435022] [2020-10-27 05:53:20,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:20,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:20,445 INFO L87 Difference]: Start difference. First operand 943 states and 1431 transitions. Second operand 6 states. [2020-10-27 05:53:20,822 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:22,196 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:22,860 INFO L93 Difference]: Finished difference Result 2452 states and 3787 transitions. [2020-10-27 05:53:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:22,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 05:53:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:22,872 INFO L225 Difference]: With dead ends: 2452 [2020-10-27 05:53:22,873 INFO L226 Difference]: Without dead ends: 1577 [2020-10-27 05:53:22,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-10-27 05:53:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1574. [2020-10-27 05:53:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1574 states. [2020-10-27 05:53:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2418 transitions. [2020-10-27 05:53:23,043 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2418 transitions. Word has length 102 [2020-10-27 05:53:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:23,045 INFO L481 AbstractCegarLoop]: Abstraction has 1574 states and 2418 transitions. [2020-10-27 05:53:23,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2418 transitions. [2020-10-27 05:53:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:53:23,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:23,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:23,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:53:23,052 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash 452495612, now seen corresponding path program 1 times [2020-10-27 05:53:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:23,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874895542] [2020-10-27 05:53:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:23,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:23,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:25,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:25,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:53:25,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2571 [2020-10-27 05:53:25,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:25,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:25,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:25,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:53:25,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:26,156 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:26,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:26,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:26,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:26,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:26,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:53:26,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:26,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:26,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:26,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:26,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874895542] [2020-10-27 05:53:26,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:26,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:26,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752018508] [2020-10-27 05:53:26,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:26,260 INFO L87 Difference]: Start difference. First operand 1574 states and 2418 transitions. Second operand 6 states. [2020-10-27 05:53:26,634 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:27,901 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:28,677 INFO L93 Difference]: Finished difference Result 4020 states and 6264 transitions. [2020-10-27 05:53:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:28,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 05:53:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:28,696 INFO L225 Difference]: With dead ends: 4020 [2020-10-27 05:53:28,696 INFO L226 Difference]: Without dead ends: 2645 [2020-10-27 05:53:28,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2020-10-27 05:53:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2642. [2020-10-27 05:53:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2020-10-27 05:53:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4086 transitions. [2020-10-27 05:53:28,940 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4086 transitions. Word has length 102 [2020-10-27 05:53:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:28,942 INFO L481 AbstractCegarLoop]: Abstraction has 2642 states and 4086 transitions. [2020-10-27 05:53:28,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4086 transitions. [2020-10-27 05:53:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:53:28,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:28,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:28,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:53:28,947 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1559983533, now seen corresponding path program 1 times [2020-10-27 05:53:28,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:28,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485548900] [2020-10-27 05:53:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:29,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:29,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:31,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:31,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:53:31,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:31,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2403 [2020-10-27 05:53:31,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:31,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:31,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:53:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:53:31,846 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:31,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:31,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:31,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:31,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:53:31,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:31,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:31,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485548900] [2020-10-27 05:53:31,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:31,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:31,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208713190] [2020-10-27 05:53:31,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:31,942 INFO L87 Difference]: Start difference. First operand 2642 states and 4086 transitions. Second operand 6 states. [2020-10-27 05:53:32,326 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:33,548 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:34,384 INFO L93 Difference]: Finished difference Result 7261 states and 11311 transitions. [2020-10-27 05:53:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:34,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 05:53:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:34,411 INFO L225 Difference]: With dead ends: 7261 [2020-10-27 05:53:34,411 INFO L226 Difference]: Without dead ends: 4777 [2020-10-27 05:53:34,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-10-27 05:53:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4774. [2020-10-27 05:53:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4774 states. [2020-10-27 05:53:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 7392 transitions. [2020-10-27 05:53:34,771 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 7392 transitions. Word has length 102 [2020-10-27 05:53:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:34,771 INFO L481 AbstractCegarLoop]: Abstraction has 4774 states and 7392 transitions. [2020-10-27 05:53:34,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 7392 transitions. [2020-10-27 05:53:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:53:34,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:34,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:34,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:53:34,776 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash 969717342, now seen corresponding path program 1 times [2020-10-27 05:53:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:34,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325264466] [2020-10-27 05:53:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:34,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:34,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:35,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:36,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:53:36,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2137 [2020-10-27 05:53:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:53:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:37,496 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:37,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:37,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:37,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:37,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:37,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:53:37,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:37,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:37,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:37,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:37,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:37,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325264466] [2020-10-27 05:53:37,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:37,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787202142] [2020-10-27 05:53:37,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:37,586 INFO L87 Difference]: Start difference. First operand 4774 states and 7392 transitions. Second operand 6 states. [2020-10-27 05:53:37,996 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:39,277 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:40,265 INFO L93 Difference]: Finished difference Result 13714 states and 21304 transitions. [2020-10-27 05:53:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:40,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 05:53:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:40,316 INFO L225 Difference]: With dead ends: 13714 [2020-10-27 05:53:40,316 INFO L226 Difference]: Without dead ends: 9061 [2020-10-27 05:53:40,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9061 states. [2020-10-27 05:53:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9061 to 9058. [2020-10-27 05:53:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9058 states. [2020-10-27 05:53:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9058 states to 9058 states and 13991 transitions. [2020-10-27 05:53:41,044 INFO L78 Accepts]: Start accepts. Automaton has 9058 states and 13991 transitions. Word has length 102 [2020-10-27 05:53:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:41,045 INFO L481 AbstractCegarLoop]: Abstraction has 9058 states and 13991 transitions. [2020-10-27 05:53:41,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9058 states and 13991 transitions. [2020-10-27 05:53:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:53:41,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:41,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:41,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:53:41,052 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1207694577, now seen corresponding path program 1 times [2020-10-27 05:53:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:41,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970016102] [2020-10-27 05:53:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:41,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:41,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:43,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:43,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:53:43,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:43,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-27 05:53:43,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:53:43,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:43,657 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:43,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:43,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:43,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:43,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:53:43,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:43,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:43,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:43,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970016102] [2020-10-27 05:53:43,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:43,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262704691] [2020-10-27 05:53:43,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:43,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:43,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:43,743 INFO L87 Difference]: Start difference. First operand 9058 states and 13991 transitions. Second operand 6 states. [2020-10-27 05:53:44,152 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:45,447 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:46,748 INFO L93 Difference]: Finished difference Result 26576 states and 41085 transitions. [2020-10-27 05:53:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:46,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 05:53:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:46,897 INFO L225 Difference]: With dead ends: 26576 [2020-10-27 05:53:46,897 INFO L226 Difference]: Without dead ends: 17609 [2020-10-27 05:53:46,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17609 states. [2020-10-27 05:53:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17609 to 17606. [2020-10-27 05:53:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17606 states. [2020-10-27 05:53:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17606 states to 17606 states and 27051 transitions. [2020-10-27 05:53:48,117 INFO L78 Accepts]: Start accepts. Automaton has 17606 states and 27051 transitions. Word has length 102 [2020-10-27 05:53:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:48,118 INFO L481 AbstractCegarLoop]: Abstraction has 17606 states and 27051 transitions. [2020-10-27 05:53:48,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 17606 states and 27051 transitions. [2020-10-27 05:53:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:53:48,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:48,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:48,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:53:48,127 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 16239456, now seen corresponding path program 1 times [2020-10-27 05:53:48,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:48,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020396830] [2020-10-27 05:53:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:48,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:48,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:53,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:53,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:53:53,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:53:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:53:53,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:53:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 05:53:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:53,765 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:53,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:53,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:53,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:53,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:53:53,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:53,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:53,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020396830] [2020-10-27 05:53:53,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:53,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:53:53,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307824491] [2020-10-27 05:53:53,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:53:53,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:53,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:53:53,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:53:53,871 INFO L87 Difference]: Start difference. First operand 17606 states and 27051 transitions. Second operand 11 states. [2020-10-27 05:53:54,355 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:53:57,273 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 05:53:57,741 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:54:04,572 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:54:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:06,738 INFO L93 Difference]: Finished difference Result 136233 states and 209783 transitions. [2020-10-27 05:54:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:54:06,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-27 05:54:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:07,331 INFO L225 Difference]: With dead ends: 136233 [2020-10-27 05:54:07,331 INFO L226 Difference]: Without dead ends: 121722 [2020-10-27 05:54:07,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:54:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121722 states. [2020-10-27 05:54:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121722 to 17760. [2020-10-27 05:54:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17760 states. [2020-10-27 05:54:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 27253 transitions. [2020-10-27 05:54:11,095 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 27253 transitions. Word has length 103 [2020-10-27 05:54:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:11,095 INFO L481 AbstractCegarLoop]: Abstraction has 17760 states and 27253 transitions. [2020-10-27 05:54:11,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:54:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 27253 transitions. [2020-10-27 05:54:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:54:11,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:11,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:11,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:54:11,107 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash 247659744, now seen corresponding path program 1 times [2020-10-27 05:54:11,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:11,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19285080] [2020-10-27 05:54:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:11,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:11,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:11,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:16,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:16,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:54:16,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:54:16,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 05:54:16,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:54:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 05:54:16,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:16,714 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:16,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:16,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:16,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:16,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:16,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:54:16,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:16,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:16,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19285080] [2020-10-27 05:54:16,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:16,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:54:16,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546691150] [2020-10-27 05:54:16,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:54:16,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:54:16,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:54:16,822 INFO L87 Difference]: Start difference. First operand 17760 states and 27253 transitions. Second operand 11 states. [2020-10-27 05:54:17,294 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:54:20,057 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:54:20,542 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:54:21,048 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:54:26,885 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:54:27,795 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 215 [2020-10-27 05:54:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:34,557 INFO L93 Difference]: Finished difference Result 122809 states and 189041 transitions. [2020-10-27 05:54:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 05:54:34,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-27 05:54:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:34,856 INFO L225 Difference]: With dead ends: 122809 [2020-10-27 05:54:34,856 INFO L226 Difference]: Without dead ends: 119472 [2020-10-27 05:54:34,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:54:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119472 states. [2020-10-27 05:54:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119472 to 17760. [2020-10-27 05:54:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17760 states. [2020-10-27 05:54:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 27251 transitions. [2020-10-27 05:54:37,810 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 27251 transitions. Word has length 103 [2020-10-27 05:54:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:37,810 INFO L481 AbstractCegarLoop]: Abstraction has 17760 states and 27251 transitions. [2020-10-27 05:54:37,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:54:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 27251 transitions. [2020-10-27 05:54:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:54:37,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:37,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:37,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:54:37,820 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash -48197504, now seen corresponding path program 1 times [2020-10-27 05:54:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:37,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498373251] [2020-10-27 05:54:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:38,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:38,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:40,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:40,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:54:40,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:54:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2756 [2020-10-27 05:54:40,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:54:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 05:54:40,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:41,148 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:41,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:41,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:41,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:54:41,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:41,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:41,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498373251] [2020-10-27 05:54:41,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:54:41,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409724363] [2020-10-27 05:54:41,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:54:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:54:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:54:41,246 INFO L87 Difference]: Start difference. First operand 17760 states and 27251 transitions. Second operand 11 states. [2020-10-27 05:54:41,739 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:54:44,199 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:54:44,679 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:54:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:52,452 INFO L93 Difference]: Finished difference Result 62760 states and 95991 transitions. [2020-10-27 05:54:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:54:52,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-27 05:54:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:52,577 INFO L225 Difference]: With dead ends: 62760 [2020-10-27 05:54:52,577 INFO L226 Difference]: Without dead ends: 56501 [2020-10-27 05:54:52,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:54:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56501 states. [2020-10-27 05:54:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56501 to 18048. [2020-10-27 05:54:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18048 states. [2020-10-27 05:54:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 27665 transitions. [2020-10-27 05:54:54,936 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 27665 transitions. Word has length 103 [2020-10-27 05:54:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:54,936 INFO L481 AbstractCegarLoop]: Abstraction has 18048 states and 27665 transitions. [2020-10-27 05:54:54,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:54:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 27665 transitions. [2020-10-27 05:54:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:54:54,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:54,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:54,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:54:54,946 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash 571335712, now seen corresponding path program 1 times [2020-10-27 05:54:54,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:54,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212363009] [2020-10-27 05:54:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:55,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:58,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3566 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 05:54:58,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:59,121 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:59,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:59,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:59,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:59,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:59,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212363009] [2020-10-27 05:54:59,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:59,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:54:59,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229815701] [2020-10-27 05:54:59,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:54:59,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:54:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:54:59,215 INFO L87 Difference]: Start difference. First operand 18048 states and 27665 transitions. Second operand 11 states. [2020-10-27 05:54:59,704 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:55:02,465 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:55:02,941 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:55:10,601 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:55:18,702 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:55:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:23,583 INFO L93 Difference]: Finished difference Result 157272 states and 242157 transitions. [2020-10-27 05:55:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 05:55:23,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-27 05:55:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:23,890 INFO L225 Difference]: With dead ends: 157272 [2020-10-27 05:55:23,891 INFO L226 Difference]: Without dead ends: 148065 [2020-10-27 05:55:23,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:55:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148065 states. [2020-10-27 05:55:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148065 to 18420. [2020-10-27 05:55:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18420 states. [2020-10-27 05:55:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18420 states to 18420 states and 28167 transitions. [2020-10-27 05:55:27,553 INFO L78 Accepts]: Start accepts. Automaton has 18420 states and 28167 transitions. Word has length 103 [2020-10-27 05:55:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:27,553 INFO L481 AbstractCegarLoop]: Abstraction has 18420 states and 28167 transitions. [2020-10-27 05:55:27,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:55:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18420 states and 28167 transitions. [2020-10-27 05:55:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:55:27,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:27,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:27,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:55:27,562 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:27,563 INFO L82 PathProgramCache]: Analyzing trace with hash -337446976, now seen corresponding path program 1 times [2020-10-27 05:55:27,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:27,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820694348] [2020-10-27 05:55:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:27,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:27,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:28,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:31,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:31,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:55:31,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3566 [2020-10-27 05:55:31,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:55:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 05:55:31,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:31,708 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:55:31,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:31,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:31,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:31,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:31,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:55:31,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:31,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:31,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:31,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:31,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:31,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820694348] [2020-10-27 05:55:31,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:31,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:55:31,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735707775] [2020-10-27 05:55:31,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:55:31,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:31,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:55:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:55:31,806 INFO L87 Difference]: Start difference. First operand 18420 states and 28167 transitions. Second operand 11 states. [2020-10-27 05:55:32,315 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:55:35,812 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:55:36,269 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:55:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:48,448 INFO L93 Difference]: Finished difference Result 84180 states and 128813 transitions. [2020-10-27 05:55:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:55:48,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-27 05:55:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:48,543 INFO L225 Difference]: With dead ends: 84180 [2020-10-27 05:55:48,543 INFO L226 Difference]: Without dead ends: 72121 [2020-10-27 05:55:48,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:55:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72121 states. [2020-10-27 05:55:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72121 to 18978. [2020-10-27 05:55:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18978 states. [2020-10-27 05:55:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18978 states to 18978 states and 28906 transitions. [2020-10-27 05:55:52,091 INFO L78 Accepts]: Start accepts. Automaton has 18978 states and 28906 transitions. Word has length 103 [2020-10-27 05:55:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:52,091 INFO L481 AbstractCegarLoop]: Abstraction has 18978 states and 28906 transitions. [2020-10-27 05:55:52,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:55:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18978 states and 28906 transitions. [2020-10-27 05:55:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:55:52,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:52,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:52,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:55:52,104 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:52,105 INFO L82 PathProgramCache]: Analyzing trace with hash -791529337, now seen corresponding path program 1 times [2020-10-27 05:55:52,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:52,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766839704] [2020-10-27 05:55:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:52,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:52,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:53,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:53,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:55:53,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:55:53,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-27 05:55:53,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:55:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:55:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:54,053 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:55:54,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:54,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:54,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:54,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:54,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:55:54,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:54,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:54,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766839704] [2020-10-27 05:55:54,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:54,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:54,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621842866] [2020-10-27 05:55:54,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:55:54,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:55:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:55:54,110 INFO L87 Difference]: Start difference. First operand 18978 states and 28906 transitions. Second operand 6 states. [2020-10-27 05:55:54,579 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:55:56,873 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:56:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:02,428 INFO L93 Difference]: Finished difference Result 55936 states and 85331 transitions. [2020-10-27 05:56:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:56:02,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-27 05:56:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:02,474 INFO L225 Difference]: With dead ends: 55936 [2020-10-27 05:56:02,475 INFO L226 Difference]: Without dead ends: 37042 [2020-10-27 05:56:02,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:56:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37042 states. [2020-10-27 05:56:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37042 to 37039. [2020-10-27 05:56:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37039 states. [2020-10-27 05:56:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37039 states to 37039 states and 56324 transitions. [2020-10-27 05:56:08,503 INFO L78 Accepts]: Start accepts. Automaton has 37039 states and 56324 transitions. Word has length 103 [2020-10-27 05:56:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:08,503 INFO L481 AbstractCegarLoop]: Abstraction has 37039 states and 56324 transitions. [2020-10-27 05:56:08,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:56:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37039 states and 56324 transitions. [2020-10-27 05:56:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 05:56:08,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:08,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:08,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:56:08,515 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash 728127861, now seen corresponding path program 1 times [2020-10-27 05:56:08,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:08,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100059025] [2020-10-27 05:56:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:08,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:08,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:09,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:09,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 05:56:09,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:56:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-27 05:56:09,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:56:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:56:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 05:56:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:09,558 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:56:09,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:09,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:09,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:09,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:09,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:09,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:56:09,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:09,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:09,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100059025] [2020-10-27 05:56:09,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:56:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243213266] [2020-10-27 05:56:09,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:56:09,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:09,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:56:09,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:56:09,608 INFO L87 Difference]: Start difference. First operand 37039 states and 56324 transitions. Second operand 9 states. [2020-10-27 05:56:10,127 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:56:14,320 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:56:14,922 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:56:15,394 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 05:56:15,836 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:56:16,330 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 207