/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_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:48:13,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:48:13,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:48:13,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:48:13,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:48:13,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:48:13,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:48:13,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:48:13,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:48:13,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:48:13,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:48:13,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:48:13,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:48:13,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:48:13,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:48:13,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:48:13,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:48:13,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:48:13,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:48:13,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:48:13,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:48:13,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:48:13,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:48:13,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:48:13,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:48:13,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:48:13,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:48:13,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:48:13,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:48:13,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:48:13,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:48:13,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:48:13,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:48:13,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:48:13,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:48:13,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:48:13,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:48:13,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:48:13,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:48:13,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:48:13,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:48:13,411 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 23:48:13,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:48:13,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:48:13,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:48:13,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:48:13,465 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:48:13,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:48:13,466 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:48:13,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:48:13,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:48:13,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:48:13,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:48:13,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:48:13,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:48:13,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:48:13,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:48:13,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:48:13,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:48:13,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:48:13,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:48:13,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:48:13,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:48:13,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:48:13,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:48:13,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:48:13,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:48:13,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:48:13,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:48:13,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:48:13,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:48:13,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:48:13,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:48:13,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:48:13,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:48:13,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:48:13,904 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:48:13,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 23:48:14,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68fc64190/27beb126de184f14af8c260226f401a2/FLAG87d3b1aed [2020-10-27 23:48:14,802 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:48:14,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 23:48:14,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68fc64190/27beb126de184f14af8c260226f401a2/FLAG87d3b1aed [2020-10-27 23:48:15,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68fc64190/27beb126de184f14af8c260226f401a2 [2020-10-27 23:48:15,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:48:15,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:48:15,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:48:15,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:48:15,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:48:15,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dfcb8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15, skipping insertion in model container [2020-10-27 23:48:15,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:48:15,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:48:15,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:48:15,436 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:48:15,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:48:15,545 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:48:15,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15 WrapperNode [2020-10-27 23:48:15,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:48:15,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:48:15,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:48:15,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:48:15,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (1/1) ... [2020-10-27 23:48:15,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:48:15,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:48:15,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:48:15,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:48:15,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (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 23:48:15,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:48:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:48:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:48:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:48:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:48:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:48:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:48:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:48:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:48:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:48:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:48:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:48:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:48:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:48:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:48:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:48:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:48:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:48:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:48:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:48:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:48:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:48:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:48:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:48:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:48:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:48:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:48:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:48:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:48:16,642 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:48:16,643 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:48:16,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:48:16 BoogieIcfgContainer [2020-10-27 23:48:16,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:48:16,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:48:16,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:48:16,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:48:16,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:48:15" (1/3) ... [2020-10-27 23:48:16,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f73876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:48:16, skipping insertion in model container [2020-10-27 23:48:16,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:15" (2/3) ... [2020-10-27 23:48:16,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f73876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:48:16, skipping insertion in model container [2020-10-27 23:48:16,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:48:16" (3/3) ... [2020-10-27 23:48:16,654 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 23:48:16,667 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:48:16,672 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:48:16,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:48:16,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:48:16,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:48:16,715 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:48:16,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:48:16,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:48:16,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:48:16,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:48:16,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:48:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-10-27 23:48:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:48:16,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:16,747 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] [2020-10-27 23:48:16,747 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash -593336161, now seen corresponding path program 1 times [2020-10-27 23:48:16,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:16,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943452699] [2020-10-27 23:48:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:17,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:17,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:17,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:18,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:19,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:22,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:22,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:48:22,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:48:22,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:48:22,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:48:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:48:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:48:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:48:22,738 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:22,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:22,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:22,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:22,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:22,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:22,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:48:22,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:22,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:22,862 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 23:48:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943452699] [2020-10-27 23:48:22,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:22,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:48:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176941814] [2020-10-27 23:48:22,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:48:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:48:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:48:22,901 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 4 states. [2020-10-27 23:48:23,545 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:24,341 INFO L93 Difference]: Finished difference Result 228 states and 365 transitions. [2020-10-27 23:48:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:48:24,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-27 23:48:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:24,357 INFO L225 Difference]: With dead ends: 228 [2020-10-27 23:48:24,358 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 23:48:24,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:48:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 23:48:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-10-27 23:48:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 23:48:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-10-27 23:48:24,434 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 64 [2020-10-27 23:48:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:24,435 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-10-27 23:48:24,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:48:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-10-27 23:48:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:48:24,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:24,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:24,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:48:24,439 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1430129785, now seen corresponding path program 1 times [2020-10-27 23:48:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:24,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845240117] [2020-10-27 23:48:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:24,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:24,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:24,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:25,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:27,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:27,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:48:27,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:48:27,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3423 [2020-10-27 23:48:27,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:48:27,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:48:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:48:27,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 23:48:28,306 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:28,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:28,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:28,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:28,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:28,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 23:48:28,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:28,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:48:28,408 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 23:48:28,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845240117] [2020-10-27 23:48:28,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:28,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:48:28,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574327594] [2020-10-27 23:48:28,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:48:28,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:48:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:48:28,418 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 4 states. [2020-10-27 23:48:28,754 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:29,370 INFO L93 Difference]: Finished difference Result 355 states and 540 transitions. [2020-10-27 23:48:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:48:29,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 23:48:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:29,375 INFO L225 Difference]: With dead ends: 355 [2020-10-27 23:48:29,375 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 23:48:29,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:48:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 23:48:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2020-10-27 23:48:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 23:48:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 360 transitions. [2020-10-27 23:48:29,411 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 360 transitions. Word has length 65 [2020-10-27 23:48:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:29,412 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 360 transitions. [2020-10-27 23:48:29,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:48:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 360 transitions. [2020-10-27 23:48:29,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:48:29,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:29,415 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] [2020-10-27 23:48:29,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:48:29,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -964945311, now seen corresponding path program 1 times [2020-10-27 23:48:29,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:29,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062858036] [2020-10-27 23:48:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:34,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:48:34,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:48:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:48:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:34,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:48:34,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:48:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:48:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:48:34,755 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:34,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:34,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:34,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:34,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:34,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:48:34,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:34,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:34,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:34,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:34,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:34,798 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 23:48:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062858036] [2020-10-27 23:48:34,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:34,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:48:34,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133922728] [2020-10-27 23:48:34,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:48:34,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:34,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:48:34,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:48:34,801 INFO L87 Difference]: Start difference. First operand 241 states and 360 transitions. Second operand 4 states. [2020-10-27 23:48:35,119 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:35,660 INFO L93 Difference]: Finished difference Result 615 states and 952 transitions. [2020-10-27 23:48:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:48:35,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:48:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:35,670 INFO L225 Difference]: With dead ends: 615 [2020-10-27 23:48:35,671 INFO L226 Difference]: Without dead ends: 412 [2020-10-27 23:48:35,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:48:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-27 23:48:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 409. [2020-10-27 23:48:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-27 23:48:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 624 transitions. [2020-10-27 23:48:35,773 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 624 transitions. Word has length 66 [2020-10-27 23:48:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:35,774 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 624 transitions. [2020-10-27 23:48:35,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:48:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 624 transitions. [2020-10-27 23:48:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:48:35,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:35,781 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] [2020-10-27 23:48:35,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:48:35,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1759693663, now seen corresponding path program 1 times [2020-10-27 23:48:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:35,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530109469] [2020-10-27 23:48:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:36,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:38,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:38,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:48:38,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:48:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2647 [2020-10-27 23:48:38,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:48:38,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:48:38,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:48:38,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:38,705 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:38,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:38,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:38,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:38,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:38,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:38,746 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 23:48:38,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530109469] [2020-10-27 23:48:38,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:38,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:48:38,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477878273] [2020-10-27 23:48:38,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:48:38,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:48:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:48:38,751 INFO L87 Difference]: Start difference. First operand 409 states and 624 transitions. Second operand 4 states. [2020-10-27 23:48:39,026 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:39,606 INFO L93 Difference]: Finished difference Result 1087 states and 1692 transitions. [2020-10-27 23:48:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:48:39,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 23:48:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:39,615 INFO L225 Difference]: With dead ends: 1087 [2020-10-27 23:48:39,615 INFO L226 Difference]: Without dead ends: 716 [2020-10-27 23:48:39,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:48:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-27 23:48:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 713. [2020-10-27 23:48:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-27 23:48:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1096 transitions. [2020-10-27 23:48:39,706 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1096 transitions. Word has length 67 [2020-10-27 23:48:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:39,706 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1096 transitions. [2020-10-27 23:48:39,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:48:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1096 transitions. [2020-10-27 23:48:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:48:39,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:39,717 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] [2020-10-27 23:48:39,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:48:39,718 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash -392431237, now seen corresponding path program 1 times [2020-10-27 23:48:39,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:39,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134176844] [2020-10-27 23:48:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:39,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:39,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:40,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:41,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:44,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:48:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:48:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:48:44,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:48:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:48:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:48:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:45,097 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:45,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:45,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:45,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:45,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:45,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:45,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:48:45,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:45,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:45,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:45,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:45,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:45,151 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 23:48:45,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134176844] [2020-10-27 23:48:45,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:45,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:48:45,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330725209] [2020-10-27 23:48:45,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:48:45,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:48:45,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:48:45,165 INFO L87 Difference]: Start difference. First operand 713 states and 1096 transitions. Second operand 7 states. [2020-10-27 23:48:45,445 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:46,057 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:48:46,335 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:46,887 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:48:47,133 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:48:47,611 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:48:47,862 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:48,356 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:48:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:48,425 INFO L93 Difference]: Finished difference Result 6089 states and 9512 transitions. [2020-10-27 23:48:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:48:48,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-27 23:48:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:48,459 INFO L225 Difference]: With dead ends: 6089 [2020-10-27 23:48:48,459 INFO L226 Difference]: Without dead ends: 5414 [2020-10-27 23:48:48,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:48:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2020-10-27 23:48:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 2041. [2020-10-27 23:48:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2041 states. [2020-10-27 23:48:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 3168 transitions. [2020-10-27 23:48:48,663 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 3168 transitions. Word has length 68 [2020-10-27 23:48:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:48,663 INFO L481 AbstractCegarLoop]: Abstraction has 2041 states and 3168 transitions. [2020-10-27 23:48:48,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:48:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 3168 transitions. [2020-10-27 23:48:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:48:48,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:48,665 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] [2020-10-27 23:48:48,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:48:48,665 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:48,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1660802912, now seen corresponding path program 1 times [2020-10-27 23:48:48,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:48,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446977338] [2020-10-27 23:48:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:49,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:50,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:50,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:48:50,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:48:50,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-27 23:48:50,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:50,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:48:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:48:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:48:50,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:50,366 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:50,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:50,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:50,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:50,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:50,402 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 23:48:50,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446977338] [2020-10-27 23:48:50,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:50,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:48:50,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485190431] [2020-10-27 23:48:50,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:48:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:48:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:48:50,407 INFO L87 Difference]: Start difference. First operand 2041 states and 3168 transitions. Second operand 4 states. [2020-10-27 23:48:50,677 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:51,339 INFO L93 Difference]: Finished difference Result 5663 states and 8804 transitions. [2020-10-27 23:48:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:48:51,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 23:48:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:51,361 INFO L225 Difference]: With dead ends: 5663 [2020-10-27 23:48:51,361 INFO L226 Difference]: Without dead ends: 3660 [2020-10-27 23:48:51,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:48:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2020-10-27 23:48:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3657. [2020-10-27 23:48:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3657 states. [2020-10-27 23:48:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 5624 transitions. [2020-10-27 23:48:51,617 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 5624 transitions. Word has length 68 [2020-10-27 23:48:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:51,618 INFO L481 AbstractCegarLoop]: Abstraction has 3657 states and 5624 transitions. [2020-10-27 23:48:51,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:48:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 5624 transitions. [2020-10-27 23:48:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:48:51,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:51,620 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] [2020-10-27 23:48:51,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:48:51,620 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 326675478, now seen corresponding path program 1 times [2020-10-27 23:48:51,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321637713] [2020-10-27 23:48:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:51,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:52,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:48:52,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:48:52,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-27 23:48:52,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:48:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:48:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:48:52,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:52,844 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:48:52,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:52,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:52,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:48:52,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:52,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:48:52,906 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 23:48:52,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321637713] [2020-10-27 23:48:52,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:52,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:48:52,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060714934] [2020-10-27 23:48:52,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:48:52,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:48:52,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:48:52,910 INFO L87 Difference]: Start difference. First operand 3657 states and 5624 transitions. Second operand 8 states. [2020-10-27 23:48:53,276 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:48:54,466 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:48:54,783 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:48:55,066 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:48:55,332 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:55,739 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:48:56,006 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:48:56,337 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:48:56,629 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:48:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:58,062 INFO L93 Difference]: Finished difference Result 39847 states and 61484 transitions. [2020-10-27 23:48:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:48:58,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-27 23:48:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:58,210 INFO L225 Difference]: With dead ends: 39847 [2020-10-27 23:48:58,211 INFO L226 Difference]: Without dead ends: 36228 [2020-10-27 23:48:58,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:48:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36228 states. [2020-10-27 23:48:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36228 to 7273. [2020-10-27 23:48:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7273 states. [2020-10-27 23:48:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7273 states to 7273 states and 11016 transitions. [2020-10-27 23:48:59,342 INFO L78 Accepts]: Start accepts. Automaton has 7273 states and 11016 transitions. Word has length 69 [2020-10-27 23:48:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:59,343 INFO L481 AbstractCegarLoop]: Abstraction has 7273 states and 11016 transitions. [2020-10-27 23:48:59,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:48:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7273 states and 11016 transitions. [2020-10-27 23:48:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:48:59,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:59,344 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] [2020-10-27 23:48:59,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:48:59,344 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:59,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1522086597, now seen corresponding path program 1 times [2020-10-27 23:48:59,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:59,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341948718] [2020-10-27 23:48:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:59,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:00,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:00,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:49:00,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:49:00,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-27 23:49:00,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:00,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:49:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 23:49:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:49:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:00,387 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:00,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:00,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:00,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:00,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:00,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:49:00,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:00,425 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 23:49:00,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341948718] [2020-10-27 23:49:00,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:00,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:49:00,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447199884] [2020-10-27 23:49:00,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:49:00,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:49:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:00,428 INFO L87 Difference]: Start difference. First operand 7273 states and 11016 transitions. Second operand 5 states. [2020-10-27 23:49:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:02,236 INFO L93 Difference]: Finished difference Result 14892 states and 22378 transitions. [2020-10-27 23:49:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:49:02,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 23:49:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:02,274 INFO L225 Difference]: With dead ends: 14892 [2020-10-27 23:49:02,274 INFO L226 Difference]: Without dead ends: 14889 [2020-10-27 23:49:02,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:49:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14889 states. [2020-10-27 23:49:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14889 to 7657. [2020-10-27 23:49:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7657 states. [2020-10-27 23:49:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 11400 transitions. [2020-10-27 23:49:03,120 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 11400 transitions. Word has length 71 [2020-10-27 23:49:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:03,121 INFO L481 AbstractCegarLoop]: Abstraction has 7657 states and 11400 transitions. [2020-10-27 23:49:03,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:49:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 11400 transitions. [2020-10-27 23:49:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:49:03,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:03,122 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] [2020-10-27 23:49:03,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:49:03,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash -900556964, now seen corresponding path program 1 times [2020-10-27 23:49:03,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:03,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346101645] [2020-10-27 23:49:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:03,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:03,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:03,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:49:03,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:49:03,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-27 23:49:03,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:49:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:49:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 23:49:03,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:04,266 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:04,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:04,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:04,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:04,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:04,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:04,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:49:04,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:04,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:04,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:04,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:04,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:04,316 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 23:49:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346101645] [2020-10-27 23:49:04,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:04,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:49:04,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515923044] [2020-10-27 23:49:04,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:49:04,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:49:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:49:04,319 INFO L87 Difference]: Start difference. First operand 7657 states and 11400 transitions. Second operand 8 states. [2020-10-27 23:49:04,676 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:49:05,899 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:06,236 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:49:06,545 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:49:06,838 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:49:07,384 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:49:07,686 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:49:08,022 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 23:49:08,337 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:49:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:10,282 INFO L93 Difference]: Finished difference Result 45767 states and 68220 transitions. [2020-10-27 23:49:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:49:10,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 23:49:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:10,373 INFO L225 Difference]: With dead ends: 45767 [2020-10-27 23:49:10,373 INFO L226 Difference]: Without dead ends: 38148 [2020-10-27 23:49:10,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:49:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38148 states. [2020-10-27 23:49:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38148 to 7657. [2020-10-27 23:49:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7657 states. [2020-10-27 23:49:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 11304 transitions. [2020-10-27 23:49:11,449 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 11304 transitions. Word has length 71 [2020-10-27 23:49:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:11,450 INFO L481 AbstractCegarLoop]: Abstraction has 7657 states and 11304 transitions. [2020-10-27 23:49:11,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:49:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 11304 transitions. [2020-10-27 23:49:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 23:49:11,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:11,451 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] [2020-10-27 23:49:11,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:49:11,451 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:11,451 INFO L82 PathProgramCache]: Analyzing trace with hash 357997530, now seen corresponding path program 1 times [2020-10-27 23:49:11,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:11,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22093349] [2020-10-27 23:49:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:11,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:11,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:49:11,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:49:11,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:12,199 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:12,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:12,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:12,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:49:12,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:12,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:12,252 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 23:49:12,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22093349] [2020-10-27 23:49:12,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:12,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:49:12,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382500308] [2020-10-27 23:49:12,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:49:12,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:49:12,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:49:12,257 INFO L87 Difference]: Start difference. First operand 7657 states and 11304 transitions. Second operand 4 states. [2020-10-27 23:49:12,516 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:49:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:13,831 INFO L93 Difference]: Finished difference Result 18753 states and 27726 transitions. [2020-10-27 23:49:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:49:13,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 23:49:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:13,858 INFO L225 Difference]: With dead ends: 18753 [2020-10-27 23:49:13,858 INFO L226 Difference]: Without dead ends: 11134 [2020-10-27 23:49:13,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11134 states. [2020-10-27 23:49:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11134 to 11131. [2020-10-27 23:49:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11131 states. [2020-10-27 23:49:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11131 states to 11131 states and 16314 transitions. [2020-10-27 23:49:15,086 INFO L78 Accepts]: Start accepts. Automaton has 11131 states and 16314 transitions. Word has length 72 [2020-10-27 23:49:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:15,086 INFO L481 AbstractCegarLoop]: Abstraction has 11131 states and 16314 transitions. [2020-10-27 23:49:15,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:49:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11131 states and 16314 transitions. [2020-10-27 23:49:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:49:15,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:15,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:15,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:49:15,094 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1548302825, now seen corresponding path program 1 times [2020-10-27 23:49:15,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:15,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945878541] [2020-10-27 23:49:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:18,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:20,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:20,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:49:20,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:49:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 23:49:20,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:49:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:49:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 23:49:20,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:20,540 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:20,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:20,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:20,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:20,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:49:20,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:20,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:49:20,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945878541] [2020-10-27 23:49:20,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:49:20,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 23:49:20,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366107986] [2020-10-27 23:49:20,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:49:20,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:20,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:49:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:49:20,591 INFO L87 Difference]: Start difference. First operand 11131 states and 16314 transitions. Second operand 8 states. [2020-10-27 23:49:20,929 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:49:22,239 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:49:22,527 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:49:22,811 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:49:23,260 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:23,570 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:49:23,872 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:49:24,214 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:49:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:29,636 INFO L93 Difference]: Finished difference Result 84329 states and 124101 transitions. [2020-10-27 23:49:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:49:29,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-27 23:49:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:29,748 INFO L225 Difference]: With dead ends: 84329 [2020-10-27 23:49:29,749 INFO L226 Difference]: Without dead ends: 73238 [2020-10-27 23:49:29,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:49:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73238 states. [2020-10-27 23:49:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73238 to 25355. [2020-10-27 23:49:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25355 states. [2020-10-27 23:49:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25355 states to 25355 states and 37018 transitions. [2020-10-27 23:49:33,490 INFO L78 Accepts]: Start accepts. Automaton has 25355 states and 37018 transitions. Word has length 98 [2020-10-27 23:49:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:33,490 INFO L481 AbstractCegarLoop]: Abstraction has 25355 states and 37018 transitions. [2020-10-27 23:49:33,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:49:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 25355 states and 37018 transitions. [2020-10-27 23:49:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:49:33,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:33,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:33,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:49:33,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -748940655, now seen corresponding path program 1 times [2020-10-27 23:49:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:33,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764924101] [2020-10-27 23:49:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:33,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:33,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:33,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:36,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:37,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:38,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:38,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:49:38,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:49:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:49:38,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:49:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:49:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 23:49:38,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:38,815 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:38,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:38,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:38,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:38,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:38,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:49:38,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:38,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764924101] [2020-10-27 23:49:38,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:49:38,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:49:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311238876] [2020-10-27 23:49:38,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:49:38,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:49:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:49:38,850 INFO L87 Difference]: Start difference. First operand 25355 states and 37018 transitions. Second operand 6 states. [2020-10-27 23:49:39,127 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:41,169 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:49:41,551 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:51,422 INFO L93 Difference]: Finished difference Result 126787 states and 183798 transitions. [2020-10-27 23:49:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:49:51,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-27 23:49:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:51,566 INFO L225 Difference]: With dead ends: 126787 [2020-10-27 23:49:51,567 INFO L226 Difference]: Without dead ends: 109872 [2020-10-27 23:49:51,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:49:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109872 states. [2020-10-27 23:50:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109872 to 75867. [2020-10-27 23:50:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75867 states. [2020-10-27 23:50:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75867 states to 75867 states and 109962 transitions. [2020-10-27 23:50:00,316 INFO L78 Accepts]: Start accepts. Automaton has 75867 states and 109962 transitions. Word has length 98 [2020-10-27 23:50:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:00,317 INFO L481 AbstractCegarLoop]: Abstraction has 75867 states and 109962 transitions. [2020-10-27 23:50:00,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:50:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 75867 states and 109962 transitions. [2020-10-27 23:50:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:50:00,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:00,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:00,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:50:00,331 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2099079935, now seen corresponding path program 1 times [2020-10-27 23:50:00,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:00,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848396964] [2020-10-27 23:50:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:00,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:00,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:00,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:02,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:05,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:50:05,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:50:05,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:50:05,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:05,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:50:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:50:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 23:50:05,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:05,673 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:50:05,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:05,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:05,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 23:50:05,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848396964] [2020-10-27 23:50:05,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:50:05,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 23:50:05,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077671004] [2020-10-27 23:50:05,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:50:05,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:05,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:50:05,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:50:05,714 INFO L87 Difference]: Start difference. First operand 75867 states and 109962 transitions. Second operand 8 states. [2020-10-27 23:50:06,041 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:50:07,557 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:50:07,825 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:50:08,167 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:50:08,769 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:50:09,079 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:50:09,348 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:50:09,694 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:50:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:33,525 INFO L93 Difference]: Finished difference Result 300702 states and 436284 transitions. [2020-10-27 23:50:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:50:33,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-27 23:50:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:34,110 INFO L225 Difference]: With dead ends: 300702 [2020-10-27 23:50:34,110 INFO L226 Difference]: Without dead ends: 252963 [2020-10-27 23:50:34,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:50:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252963 states. [2020-10-27 23:50:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252963 to 120491. [2020-10-27 23:50:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120491 states. [2020-10-27 23:50:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120491 states to 120491 states and 174234 transitions. [2020-10-27 23:50:48,476 INFO L78 Accepts]: Start accepts. Automaton has 120491 states and 174234 transitions. Word has length 98 [2020-10-27 23:50:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:48,476 INFO L481 AbstractCegarLoop]: Abstraction has 120491 states and 174234 transitions. [2020-10-27 23:50:48,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:50:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 120491 states and 174234 transitions. [2020-10-27 23:50:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:50:48,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:48,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:48,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:50:48,493 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1362978053, now seen corresponding path program 1 times [2020-10-27 23:50:48,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:48,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334215027] [2020-10-27 23:50:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:49,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:50,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:53,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 23:50:53,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:53,827 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:50:53,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:53,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:53,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:53,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 23:50:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334215027] [2020-10-27 23:50:53,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:50:53,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 23:50:53,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102558271] [2020-10-27 23:50:53,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:50:53,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:53,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:50:53,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:50:53,863 INFO L87 Difference]: Start difference. First operand 120491 states and 174234 transitions. Second operand 8 states. [2020-10-27 23:50:54,185 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:50:55,870 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:50:56,204 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:50:56,783 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:50:57,093 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:50:57,367 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:50:57,645 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:50:57,998 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:51:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:51:26,619 INFO L93 Difference]: Finished difference Result 335924 states and 486907 transitions. [2020-10-27 23:51:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:51:26,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-27 23:51:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:51:27,381 INFO L225 Difference]: With dead ends: 335924 [2020-10-27 23:51:27,381 INFO L226 Difference]: Without dead ends: 288185 [2020-10-27 23:51:27,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:51:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288185 states. [2020-10-27 23:51:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288185 to 153707. [2020-10-27 23:51:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153707 states. [2020-10-27 23:51:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153707 states to 153707 states and 222186 transitions. [2020-10-27 23:51:46,304 INFO L78 Accepts]: Start accepts. Automaton has 153707 states and 222186 transitions. Word has length 98 [2020-10-27 23:51:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:46,304 INFO L481 AbstractCegarLoop]: Abstraction has 153707 states and 222186 transitions. [2020-10-27 23:51:46,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:51:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 153707 states and 222186 transitions. [2020-10-27 23:51:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:51:46,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:46,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:46,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:51:46,315 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1595390069, now seen corresponding path program 1 times [2020-10-27 23:51:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:46,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600478076] [2020-10-27 23:51:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:46,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:46,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:46,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:47,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:47,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:47,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:48,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:49,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:49,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:49,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:51,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:51,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:51:51,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:51:51,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:51:51,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:51,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:51:51,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:51:51,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:51:51,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:51,827 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:51:51,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:51,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:51,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:51,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600478076] [2020-10-27 23:51:51,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:51:51,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 23:51:51,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032191184] [2020-10-27 23:51:51,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:51:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:51:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:51:51,875 INFO L87 Difference]: Start difference. First operand 153707 states and 222186 transitions. Second operand 11 states. [2020-10-27 23:51:52,239 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 168