/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:37:19,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:37:19,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:37:19,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:37:19,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:37:19,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:37:19,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:37:19,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:37:19,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:37:19,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:37:19,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:37:19,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:37:19,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:37:19,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:37:19,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:37:19,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:37:19,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:37:19,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:37:19,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:37:19,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:37:19,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:37:19,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:37:19,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:37:19,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:37:19,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:37:19,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:37:19,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:37:19,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:37:19,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:37:19,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:37:19,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:37:19,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:37:19,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:37:19,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:37:19,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:37:19,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:37:19,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:37:19,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:37:19,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:37:19,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:37:19,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:37:19,477 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 23:37:19,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:37:19,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:37:19,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:37:19,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:37:19,532 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:37:19,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:37:19,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:37:19,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:37:19,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:37:19,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:37:19,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:37:19,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:37:19,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:37:19,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:37:19,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:37:19,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:37:19,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:37:19,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:37:19,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:37:19,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:37:19,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:37:19,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:37:19,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:37:19,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:37:19,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:37:19,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:37:19,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:37:19,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:37:19,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:37:19,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:37:19,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:37:20,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:37:20,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:37:20,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:37:20,012 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:37:20,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:37:20,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10f230411/5219a4720a66458e8ca484139785562f/FLAG449aeaa30 [2020-10-27 23:37:20,974 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:37:20,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:37:21,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10f230411/5219a4720a66458e8ca484139785562f/FLAG449aeaa30 [2020-10-27 23:37:21,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10f230411/5219a4720a66458e8ca484139785562f [2020-10-27 23:37:21,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:37:21,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:37:21,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:37:21,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:37:21,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:37:21,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:37:21" (1/1) ... [2020-10-27 23:37:21,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf4485e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:21, skipping insertion in model container [2020-10-27 23:37:21,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:37:21" (1/1) ... [2020-10-27 23:37:21,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:37:21,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:37:22,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:37:22,879 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:37:23,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:37:23,748 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:37:23,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23 WrapperNode [2020-10-27 23:37:23,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:37:23,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:37:23,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:37:23,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:37:23,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:23,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:23,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:23,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:23,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:23,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:24,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (1/1) ... [2020-10-27 23:37:24,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:37:24,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:37:24,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:37:24,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:37:24,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (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 23:37:24,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:37:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:37:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:37:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:37:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:37:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:37:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:37:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:37:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:37:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:37:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:37:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:37:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:37:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:37:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:37:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:37:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:37:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:37:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:37:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:37:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:37:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:37:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:37:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:37:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:37:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:37:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:37:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:37:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:37:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:37:28,352 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:37:28,353 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:37:28,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:37:28 BoogieIcfgContainer [2020-10-27 23:37:28,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:37:28,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:37:28,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:37:28,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:37:28,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:37:21" (1/3) ... [2020-10-27 23:37:28,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8192c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:37:28, skipping insertion in model container [2020-10-27 23:37:28,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:23" (2/3) ... [2020-10-27 23:37:28,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8192c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:37:28, skipping insertion in model container [2020-10-27 23:37:28,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:37:28" (3/3) ... [2020-10-27 23:37:28,370 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:37:28,383 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:37:28,389 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:37:28,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:37:28,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:37:28,450 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:37:28,451 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:37:28,451 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:37:28,451 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:37:28,454 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:37:28,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:37:28,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:37:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states. [2020-10-27 23:37:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-27 23:37:28,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:37:28,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:28,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:37:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:37:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1030577711, now seen corresponding path program 1 times [2020-10-27 23:37:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:37:28,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214882693] [2020-10-27 23:37:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:37:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:29,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:30,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:31,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:34,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:34,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-27 23:37:34,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:37:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-27 23:37:34,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:37:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 23:37:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-27 23:37:34,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:37:36,101 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:37:36,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:37:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:36,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:36,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:37:36,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:37:36,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 23:37:36,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:37:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:37:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:37:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:37:36,638 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 23:37:36,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214882693] [2020-10-27 23:37:36,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:37:36,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:37:36,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567582512] [2020-10-27 23:37:36,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:37:36,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:37:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:37:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:37:36,673 INFO L87 Difference]: Start difference. First operand 1344 states. Second operand 4 states. [2020-10-27 23:37:37,720 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 413 [2020-10-27 23:37:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:37:48,546 INFO L93 Difference]: Finished difference Result 2268 states and 4040 transitions. [2020-10-27 23:37:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:37:48,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-10-27 23:37:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:37:48,600 INFO L225 Difference]: With dead ends: 2268 [2020-10-27 23:37:48,600 INFO L226 Difference]: Without dead ends: 1995 [2020-10-27 23:37:48,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:37:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2020-10-27 23:37:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1992. [2020-10-27 23:37:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2020-10-27 23:37:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 3231 transitions. [2020-10-27 23:37:48,818 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 3231 transitions. Word has length 477 [2020-10-27 23:37:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:37:48,822 INFO L481 AbstractCegarLoop]: Abstraction has 1992 states and 3231 transitions. [2020-10-27 23:37:48,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:37:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 3231 transitions. [2020-10-27 23:37:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-27 23:37:48,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:37:48,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:48,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:37:48,840 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:37:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:37:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 985269987, now seen corresponding path program 1 times [2020-10-27 23:37:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:37:48,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038404137] [2020-10-27 23:37:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:37:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:50,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:51,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:54,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:54,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-27 23:37:54,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:37:54,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 23:37:54,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:37:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:37:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-27 23:37:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:37:55,570 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:37:55,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:37:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:55,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:55,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:37:55,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:37:55,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:37:55,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:55,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:37:55,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:37:55,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:37:55,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:37:56,107 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 23:37:56,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038404137] [2020-10-27 23:37:56,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:37:56,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:37:56,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394418651] [2020-10-27 23:37:56,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:37:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:37:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:37:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:37:56,112 INFO L87 Difference]: Start difference. First operand 1992 states and 3231 transitions. Second operand 5 states. [2020-10-27 23:38:09,588 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-10-27 23:38:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:12,619 INFO L93 Difference]: Finished difference Result 5842 states and 9460 transitions. [2020-10-27 23:38:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:38:12,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-10-27 23:38:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:12,642 INFO L225 Difference]: With dead ends: 5842 [2020-10-27 23:38:12,643 INFO L226 Difference]: Without dead ends: 3899 [2020-10-27 23:38:12,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:38:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2020-10-27 23:38:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3896. [2020-10-27 23:38:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3896 states. [2020-10-27 23:38:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 6288 transitions. [2020-10-27 23:38:12,825 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 6288 transitions. Word has length 477 [2020-10-27 23:38:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:12,825 INFO L481 AbstractCegarLoop]: Abstraction has 3896 states and 6288 transitions. [2020-10-27 23:38:12,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:38:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 6288 transitions. [2020-10-27 23:38:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-27 23:38:12,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:12,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:12,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:38:12,848 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 634047786, now seen corresponding path program 1 times [2020-10-27 23:38:12,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:12,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144631945] [2020-10-27 23:38:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:13,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:13,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:13,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:13,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:14,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:14,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:15,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:15,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:16,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:18,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:18,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 487 [2020-10-27 23:38:18,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:38:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-27 23:38:18,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:38:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 321 [2020-10-27 23:38:18,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:19,288 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:38:19,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:19,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:19,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:19,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:19,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:19,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 23:38:19,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:19,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:19,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:19,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:19,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:19,792 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 23:38:19,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144631945] [2020-10-27 23:38:19,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:19,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:19,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434053170] [2020-10-27 23:38:19,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:19,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:19,795 INFO L87 Difference]: Start difference. First operand 3896 states and 6288 transitions. Second operand 4 states. [2020-10-27 23:38:35,305 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:38:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:37,979 INFO L93 Difference]: Finished difference Result 11401 states and 18361 transitions. [2020-10-27 23:38:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:37,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-10-27 23:38:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:38,019 INFO L225 Difference]: With dead ends: 11401 [2020-10-27 23:38:38,019 INFO L226 Difference]: Without dead ends: 7671 [2020-10-27 23:38:38,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2020-10-27 23:38:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 7668. [2020-10-27 23:38:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7668 states. [2020-10-27 23:38:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7668 states to 7668 states and 12327 transitions. [2020-10-27 23:38:38,364 INFO L78 Accepts]: Start accepts. Automaton has 7668 states and 12327 transitions. Word has length 479 [2020-10-27 23:38:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:38,364 INFO L481 AbstractCegarLoop]: Abstraction has 7668 states and 12327 transitions. [2020-10-27 23:38:38,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7668 states and 12327 transitions. [2020-10-27 23:38:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-27 23:38:38,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:38,394 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:38,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:38:38,395 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1471272423, now seen corresponding path program 1 times [2020-10-27 23:38:38,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:38,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683212986] [2020-10-27 23:38:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:38,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:40,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:40,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:40,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:42,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:42,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:42,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:43,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:43,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 488 [2020-10-27 23:38:43,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:38:43,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-27 23:38:43,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:38:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-27 23:38:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:44,623 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:38:44,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:44,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:44,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:44,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 23:38:44,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:45,020 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 23:38:45,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683212986] [2020-10-27 23:38:45,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:45,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:45,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208084047] [2020-10-27 23:38:45,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:45,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:45,024 INFO L87 Difference]: Start difference. First operand 7668 states and 12327 transitions. Second operand 4 states. [2020-10-27 23:39:01,313 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:39:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:03,987 INFO L93 Difference]: Finished difference Result 22529 states and 36152 transitions. [2020-10-27 23:39:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:03,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-10-27 23:39:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:04,052 INFO L225 Difference]: With dead ends: 22529 [2020-10-27 23:39:04,052 INFO L226 Difference]: Without dead ends: 15085 [2020-10-27 23:39:04,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:39:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15085 states. [2020-10-27 23:39:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15085 to 15082. [2020-10-27 23:39:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15082 states. [2020-10-27 23:39:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15082 states to 15082 states and 24139 transitions. [2020-10-27 23:39:04,668 INFO L78 Accepts]: Start accepts. Automaton has 15082 states and 24139 transitions. Word has length 480 [2020-10-27 23:39:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:04,669 INFO L481 AbstractCegarLoop]: Abstraction has 15082 states and 24139 transitions. [2020-10-27 23:39:04,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 15082 states and 24139 transitions. [2020-10-27 23:39:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-27 23:39:04,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:04,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:04,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:39:04,703 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:04,704 INFO L82 PathProgramCache]: Analyzing trace with hash 999863554, now seen corresponding path program 1 times [2020-10-27 23:39:04,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:04,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997025422] [2020-10-27 23:39:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:05,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:09,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 488 [2020-10-27 23:39:09,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:39:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 23:39:09,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 23:39:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:10,851 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:39:10,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:10,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:10,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:10,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:10,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:10,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:39:10,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:10,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:10,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:10,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:11,027 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 23:39:11,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997025422] [2020-10-27 23:39:11,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:11,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:39:11,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573260070] [2020-10-27 23:39:11,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:39:11,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:11,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:39:11,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:11,030 INFO L87 Difference]: Start difference. First operand 15082 states and 24139 transitions. Second operand 4 states. [2020-10-27 23:39:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:29,886 INFO L93 Difference]: Finished difference Result 45023 states and 72012 transitions. [2020-10-27 23:39:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:39:29,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-10-27 23:39:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:29,956 INFO L225 Difference]: With dead ends: 45023 [2020-10-27 23:39:29,957 INFO L226 Difference]: Without dead ends: 30049 [2020-10-27 23:39:29,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30049 states. [2020-10-27 23:39:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30049 to 15143. [2020-10-27 23:39:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15143 states. [2020-10-27 23:39:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15143 states to 15143 states and 24231 transitions. [2020-10-27 23:39:30,770 INFO L78 Accepts]: Start accepts. Automaton has 15143 states and 24231 transitions. Word has length 480 [2020-10-27 23:39:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:30,771 INFO L481 AbstractCegarLoop]: Abstraction has 15143 states and 24231 transitions. [2020-10-27 23:39:30,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 15143 states and 24231 transitions. [2020-10-27 23:39:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-27 23:39:30,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:30,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:30,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:39:30,806 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1849657096, now seen corresponding path program 1 times [2020-10-27 23:39:30,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:30,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944940948] [2020-10-27 23:39:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:30,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:30,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:31,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:31,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:32,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:32,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:33,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:33,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:35,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 489 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-27 23:39:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:36,951 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:39:36,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:36,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:36,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:36,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 23:39:36,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:37,274 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 23:39:37,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944940948] [2020-10-27 23:39:37,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:37,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:39:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202936327] [2020-10-27 23:39:37,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:39:37,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:39:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:37,278 INFO L87 Difference]: Start difference. First operand 15143 states and 24231 transitions. Second operand 4 states. [2020-10-27 23:39:54,538 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:39:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:57,805 INFO L93 Difference]: Finished difference Result 43742 states and 69866 transitions. [2020-10-27 23:39:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:57,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-10-27 23:39:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:57,862 INFO L225 Difference]: With dead ends: 43742 [2020-10-27 23:39:57,863 INFO L226 Difference]: Without dead ends: 29138 [2020-10-27 23:39:57,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:39:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29138 states. [2020-10-27 23:39:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29138 to 29135. [2020-10-27 23:39:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29135 states. [2020-10-27 23:39:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29135 states to 29135 states and 46418 transitions. [2020-10-27 23:39:59,359 INFO L78 Accepts]: Start accepts. Automaton has 29135 states and 46418 transitions. Word has length 481 [2020-10-27 23:39:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:59,360 INFO L481 AbstractCegarLoop]: Abstraction has 29135 states and 46418 transitions. [2020-10-27 23:39:59,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29135 states and 46418 transitions. [2020-10-27 23:39:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-27 23:39:59,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:59,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:59,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:39:59,412 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -353591861, now seen corresponding path program 1 times [2020-10-27 23:39:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:59,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146869042] [2020-10-27 23:39:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:01,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:02,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:02,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:02,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:04,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 489 [2020-10-27 23:40:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:40:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 23:40:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:40:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:40:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:40:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:05,640 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:40:05,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:05,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:05,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:05,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:05,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:40:05,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:05,878 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 23:40:05,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146869042] [2020-10-27 23:40:05,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:05,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:40:05,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053721359] [2020-10-27 23:40:05,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:40:05,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:40:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:05,881 INFO L87 Difference]: Start difference. First operand 29135 states and 46418 transitions. Second operand 5 states. [2020-10-27 23:40:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:25,183 INFO L93 Difference]: Finished difference Result 83196 states and 131820 transitions. [2020-10-27 23:40:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:40:25,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 481 [2020-10-27 23:40:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:25,271 INFO L225 Difference]: With dead ends: 83196 [2020-10-27 23:40:25,271 INFO L226 Difference]: Without dead ends: 56403 [2020-10-27 23:40:25,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:40:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56403 states. [2020-10-27 23:40:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56403 to 30961. [2020-10-27 23:40:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30961 states. [2020-10-27 23:40:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30961 states to 30961 states and 49710 transitions. [2020-10-27 23:40:27,292 INFO L78 Accepts]: Start accepts. Automaton has 30961 states and 49710 transitions. Word has length 481 [2020-10-27 23:40:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:27,292 INFO L481 AbstractCegarLoop]: Abstraction has 30961 states and 49710 transitions. [2020-10-27 23:40:27,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:40:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30961 states and 49710 transitions. [2020-10-27 23:40:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-10-27 23:40:27,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:27,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:27,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:40:27,331 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1202527878, now seen corresponding path program 1 times [2020-10-27 23:40:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:27,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372390158] [2020-10-27 23:40:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:27,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:27,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:28,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:28,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:28,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:32,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:32,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:32,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 492 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:40:32,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:33,607 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-27 23:40:33,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:33,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:33,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:33,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:33,805 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 23:40:33,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372390158] [2020-10-27 23:40:33,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:33,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:40:33,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949289410] [2020-10-27 23:40:33,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:40:33,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:33,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:40:33,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:33,808 INFO L87 Difference]: Start difference. First operand 30961 states and 49710 transitions. Second operand 5 states. [2020-10-27 23:40:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:52,662 INFO L93 Difference]: Finished difference Result 81126 states and 127903 transitions. [2020-10-27 23:40:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:40:52,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-10-27 23:40:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:52,755 INFO L225 Difference]: With dead ends: 81126 [2020-10-27 23:40:52,755 INFO L226 Difference]: Without dead ends: 56893 [2020-10-27 23:40:52,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:40:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56893 states. [2020-10-27 23:40:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56893 to 33851. [2020-10-27 23:40:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33851 states. [2020-10-27 23:40:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33851 states to 33851 states and 54901 transitions. [2020-10-27 23:40:54,777 INFO L78 Accepts]: Start accepts. Automaton has 33851 states and 54901 transitions. Word has length 484 [2020-10-27 23:40:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:54,778 INFO L481 AbstractCegarLoop]: Abstraction has 33851 states and 54901 transitions. [2020-10-27 23:40:54,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:40:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33851 states and 54901 transitions. [2020-10-27 23:40:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-27 23:40:54,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:54,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:54,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:40:54,813 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1993489065, now seen corresponding path program 1 times [2020-10-27 23:40:54,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:54,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340699970] [2020-10-27 23:40:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:54,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:56,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking...