/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:50:13,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:50:13,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:50:13,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:50:13,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:50:13,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:50:13,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:50:13,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:50:13,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:50:13,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:50:13,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:50:13,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:50:13,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:50:13,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:50:13,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:50:13,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:50:13,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:50:13,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:50:13,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:50:13,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:50:13,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:50:13,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:50:13,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:50:13,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:50:13,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:50:13,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:50:13,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:50:13,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:50:13,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:50:13,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:50:13,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:50:13,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:50:13,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:50:13,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:50:13,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:50:13,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:50:13,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:50:13,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:50:13,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:50:13,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:50:13,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:50:13,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:50:13,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:50:13,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:50:13,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:50:13,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:50:13,297 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:50:13,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:50:13,298 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:50:13,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:50:13,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:50:13,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:50:13,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:50:13,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:50:13,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:50:13,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:50:13,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:50:13,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:50:13,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:50:13,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:50:13,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:50:13,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:50:13,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:50:13,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:50:13,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:50:13,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:50:13,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:50:13,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:50:13,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:50:13,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:50:13,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:50:13,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:50:13,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:50:13,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:50:13,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:50:13,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:50:13,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:50:13,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 05:50:13,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2b069bbe/9ba838edca7f4f8789ad6e0098938641/FLAG043fdf14d [2020-10-27 05:50:14,489 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:50:14,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 05:50:14,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2b069bbe/9ba838edca7f4f8789ad6e0098938641/FLAG043fdf14d [2020-10-27 05:50:14,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2b069bbe/9ba838edca7f4f8789ad6e0098938641 [2020-10-27 05:50:14,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:50:14,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:50:14,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:50:14,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:50:14,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:50:14,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:50:14" (1/1) ... [2020-10-27 05:50:14,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151f1b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:14, skipping insertion in model container [2020-10-27 05:50:14,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:50:14" (1/1) ... [2020-10-27 05:50:14,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:50:14,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:50:15,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:50:15,352 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:50:15,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:50:15,538 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:50:15,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15 WrapperNode [2020-10-27 05:50:15,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:50:15,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:50:15,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:50:15,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:50:15,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (1/1) ... [2020-10-27 05:50:15,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:50:15,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:50:15,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:50:15,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:50:15,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (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 05:50:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:50:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:50:15,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:50:15,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:50:15,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:50:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:50:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:50:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:50:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:50:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:50:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:50:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:50:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:50:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:50:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:50:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:50:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:50:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:50:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:50:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:50:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:50:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:50:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:50:16,618 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:50:16,618 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:50:16,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:50:16 BoogieIcfgContainer [2020-10-27 05:50:16,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:50:16,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:50:16,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:50:16,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:50:16,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:50:14" (1/3) ... [2020-10-27 05:50:16,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8e43ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:50:16, skipping insertion in model container [2020-10-27 05:50:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:15" (2/3) ... [2020-10-27 05:50:16,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8e43ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:50:16, skipping insertion in model container [2020-10-27 05:50:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:50:16" (3/3) ... [2020-10-27 05:50:16,629 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 05:50:16,640 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:50:16,645 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:50:16,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:50:16,685 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:50:16,685 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:50:16,685 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:50:16,685 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:50:16,685 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:50:16,686 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:50:16,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:50:16,686 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:50:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-27 05:50:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:50:16,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:16,716 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 05:50:16,717 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1110750841, now seen corresponding path program 1 times [2020-10-27 05:50:16,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:16,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930469877] [2020-10-27 05:50:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:17,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:17,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:17,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:17,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:18,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:19,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:22,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:22,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:50:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:50:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:50:22,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:22,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:50:22,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:50:22,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:50:22,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:50:22,478 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:22,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:22,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:22,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:22,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:22,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:22,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:50:22,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:22,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:22,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:22,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:22,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:50:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:22,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930469877] [2020-10-27 05:50:22,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:22,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:50:22,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353547687] [2020-10-27 05:50:22,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:50:22,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:50:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:50:22,606 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 8 states. [2020-10-27 05:50:23,111 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:50:24,582 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:50:24,930 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:50:25,275 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:50:25,536 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:50:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:25,623 INFO L93 Difference]: Finished difference Result 763 states and 1215 transitions. [2020-10-27 05:50:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:50:25,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 05:50:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:25,659 INFO L225 Difference]: With dead ends: 763 [2020-10-27 05:50:25,660 INFO L226 Difference]: Without dead ends: 633 [2020-10-27 05:50:25,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:50:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-10-27 05:50:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 234. [2020-10-27 05:50:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 05:50:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 349 transitions. [2020-10-27 05:50:25,771 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 349 transitions. Word has length 65 [2020-10-27 05:50:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:25,772 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 349 transitions. [2020-10-27 05:50:25,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:50:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 349 transitions. [2020-10-27 05:50:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:50:25,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:25,786 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 05:50:25,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:50:25,786 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash -501272047, now seen corresponding path program 1 times [2020-10-27 05:50:25,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:25,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40838611] [2020-10-27 05:50:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:25,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:25,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:27,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:30,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:30,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:50:30,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:50:30,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4417 [2020-10-27 05:50:30,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:50:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:50:30,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:30,566 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:30,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:30,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:30,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:30,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:30,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:50:30,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:30,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:30,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40838611] [2020-10-27 05:50:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:30,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:50:30,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715930562] [2020-10-27 05:50:30,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:50:30,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:50:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:50:30,619 INFO L87 Difference]: Start difference. First operand 234 states and 349 transitions. Second operand 4 states. [2020-10-27 05:50:30,925 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:50:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:31,835 INFO L93 Difference]: Finished difference Result 592 states and 917 transitions. [2020-10-27 05:50:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:50:31,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 05:50:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:31,841 INFO L225 Difference]: With dead ends: 592 [2020-10-27 05:50:31,842 INFO L226 Difference]: Without dead ends: 397 [2020-10-27 05:50:31,845 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 05:50:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-27 05:50:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 394. [2020-10-27 05:50:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-27 05:50:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 603 transitions. [2020-10-27 05:50:31,882 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 603 transitions. Word has length 66 [2020-10-27 05:50:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:31,882 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 603 transitions. [2020-10-27 05:50:31,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:50:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 603 transitions. [2020-10-27 05:50:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:50:31,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:31,884 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 05:50:31,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:50:31,884 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1651203884, now seen corresponding path program 1 times [2020-10-27 05:50:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:31,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294882031] [2020-10-27 05:50:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:31,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:32,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:32,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:33,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:33,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:50:33,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:50:33,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-27 05:50:33,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:33,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:33,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:50:33,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:50:33,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:34,174 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:34,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:34,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:34,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:34,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:50:34,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:34,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:34,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294882031] [2020-10-27 05:50:34,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:34,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:50:34,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782887998] [2020-10-27 05:50:34,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:50:34,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:50:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:50:34,225 INFO L87 Difference]: Start difference. First operand 394 states and 603 transitions. Second operand 4 states. [2020-10-27 05:50:34,523 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:50:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:35,400 INFO L93 Difference]: Finished difference Result 1040 states and 1627 transitions. [2020-10-27 05:50:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:50:35,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:50:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:35,405 INFO L225 Difference]: With dead ends: 1040 [2020-10-27 05:50:35,406 INFO L226 Difference]: Without dead ends: 685 [2020-10-27 05:50:35,408 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 05:50:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-10-27 05:50:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 682. [2020-10-27 05:50:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-10-27 05:50:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1057 transitions. [2020-10-27 05:50:35,452 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1057 transitions. Word has length 67 [2020-10-27 05:50:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:35,453 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 1057 transitions. [2020-10-27 05:50:35,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:50:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1057 transitions. [2020-10-27 05:50:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:50:35,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:35,454 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 05:50:35,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:50:35,455 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash -894779684, now seen corresponding path program 1 times [2020-10-27 05:50:35,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:35,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913742668] [2020-10-27 05:50:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:35,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:35,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:36,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:36,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:50:36,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:50:36,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-27 05:50:36,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:36,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:36,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:50:36,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:50:36,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:36,745 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:36,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:36,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:36,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:36,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:36,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:50:36,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:36,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:36,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913742668] [2020-10-27 05:50:36,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:36,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:50:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217269205] [2020-10-27 05:50:36,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:50:36,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:36,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:50:36,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:50:36,793 INFO L87 Difference]: Start difference. First operand 682 states and 1057 transitions. Second operand 4 states. [2020-10-27 05:50:37,111 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:50:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:37,913 INFO L93 Difference]: Finished difference Result 1840 states and 2885 transitions. [2020-10-27 05:50:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:50:37,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 05:50:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:37,920 INFO L225 Difference]: With dead ends: 1840 [2020-10-27 05:50:37,921 INFO L226 Difference]: Without dead ends: 1197 [2020-10-27 05:50:37,923 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 05:50:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-10-27 05:50:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1194. [2020-10-27 05:50:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-10-27 05:50:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1857 transitions. [2020-10-27 05:50:38,012 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1857 transitions. Word has length 68 [2020-10-27 05:50:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:38,013 INFO L481 AbstractCegarLoop]: Abstraction has 1194 states and 1857 transitions. [2020-10-27 05:50:38,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:50:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1857 transitions. [2020-10-27 05:50:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:50:38,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:38,014 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 05:50:38,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:50:38,015 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:38,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1881615657, now seen corresponding path program 1 times [2020-10-27 05:50:38,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:38,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559817373] [2020-10-27 05:50:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:38,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:38,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:38,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:38,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:38,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:50:38,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:50:38,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 05:50:38,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:38,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:50:38,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:50:38,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:38,854 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:38,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:38,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:38,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:38,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:38,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:38,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559817373] [2020-10-27 05:50:38,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:38,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:50:38,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796544265] [2020-10-27 05:50:38,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:50:38,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:50:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:50:38,899 INFO L87 Difference]: Start difference. First operand 1194 states and 1857 transitions. Second operand 4 states. [2020-10-27 05:50:39,252 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:50:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:40,121 INFO L93 Difference]: Finished difference Result 3248 states and 5077 transitions. [2020-10-27 05:50:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:50:40,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:50:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:40,133 INFO L225 Difference]: With dead ends: 3248 [2020-10-27 05:50:40,133 INFO L226 Difference]: Without dead ends: 2093 [2020-10-27 05:50:40,136 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 05:50:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-10-27 05:50:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2090. [2020-10-27 05:50:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-27 05:50:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3241 transitions. [2020-10-27 05:50:40,264 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3241 transitions. Word has length 69 [2020-10-27 05:50:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:40,264 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3241 transitions. [2020-10-27 05:50:40,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:50:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3241 transitions. [2020-10-27 05:50:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:50:40,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:40,265 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] [2020-10-27 05:50:40,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:50:40,266 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:40,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1716669253, now seen corresponding path program 1 times [2020-10-27 05:50:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:40,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019269818] [2020-10-27 05:50:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:40,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:50:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:50:40,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:40,848 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:40,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:40,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:40,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:40,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:40,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:40,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:50:40,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:40,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019269818] [2020-10-27 05:50:40,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:40,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:50:40,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636705917] [2020-10-27 05:50:40,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:50:40,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:50:40,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:50:40,889 INFO L87 Difference]: Start difference. First operand 2090 states and 3241 transitions. Second operand 4 states. [2020-10-27 05:50:41,178 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:50:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:42,071 INFO L93 Difference]: Finished difference Result 5680 states and 8813 transitions. [2020-10-27 05:50:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:50:42,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 05:50:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:42,091 INFO L225 Difference]: With dead ends: 5680 [2020-10-27 05:50:42,091 INFO L226 Difference]: Without dead ends: 3629 [2020-10-27 05:50:42,097 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 05:50:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2020-10-27 05:50:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3626. [2020-10-27 05:50:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2020-10-27 05:50:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 5577 transitions. [2020-10-27 05:50:42,365 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 5577 transitions. Word has length 70 [2020-10-27 05:50:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:42,366 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 5577 transitions. [2020-10-27 05:50:42,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:50:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 5577 transitions. [2020-10-27 05:50:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:50:42,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:42,368 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 05:50:42,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:50:42,368 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2036889234, now seen corresponding path program 1 times [2020-10-27 05:50:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:42,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317728938] [2020-10-27 05:50:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:43,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:43,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:50:43,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:50:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-27 05:50:43,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:43,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:50:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:50:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:50:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:43,751 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:43,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:43,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:43,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:43,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:43,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:50:43,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:43,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317728938] [2020-10-27 05:50:43,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:43,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:50:43,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163139705] [2020-10-27 05:50:43,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:50:43,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:43,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:50:43,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:50:43,818 INFO L87 Difference]: Start difference. First operand 3626 states and 5577 transitions. Second operand 8 states. [2020-10-27 05:50:44,786 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:50:45,105 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:50:45,465 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:50:45,781 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:50:46,096 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:50:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:47,839 INFO L93 Difference]: Finished difference Result 18841 states and 28787 transitions. [2020-10-27 05:50:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:50:47,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 05:50:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:47,919 INFO L225 Difference]: With dead ends: 18841 [2020-10-27 05:50:47,920 INFO L226 Difference]: Without dead ends: 15254 [2020-10-27 05:50:47,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:50:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15254 states. [2020-10-27 05:50:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15254 to 15242. [2020-10-27 05:50:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15242 states. [2020-10-27 05:50:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15242 states to 15242 states and 23177 transitions. [2020-10-27 05:50:49,088 INFO L78 Accepts]: Start accepts. Automaton has 15242 states and 23177 transitions. Word has length 71 [2020-10-27 05:50:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:49,089 INFO L481 AbstractCegarLoop]: Abstraction has 15242 states and 23177 transitions. [2020-10-27 05:50:49,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:50:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 15242 states and 23177 transitions. [2020-10-27 05:50:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:50:49,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:49,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:50:49,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:50:49,098 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1230849636, now seen corresponding path program 1 times [2020-10-27 05:50:49,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:49,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344787748] [2020-10-27 05:50:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:49,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:49,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:50:49,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 05:50:49,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:50:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 05:50:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:50:49,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:49,729 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:49,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:49,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:49,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:49,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:49,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:49,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:50:49,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:49,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:49,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344787748] [2020-10-27 05:50:49,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:49,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:50:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23167913] [2020-10-27 05:50:49,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:50:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:50:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:50:49,769 INFO L87 Difference]: Start difference. First operand 15242 states and 23177 transitions. Second operand 5 states. [2020-10-27 05:50:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:52,737 INFO L93 Difference]: Finished difference Result 31085 states and 46955 transitions. [2020-10-27 05:50:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:50:52,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 05:50:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:52,844 INFO L225 Difference]: With dead ends: 31085 [2020-10-27 05:50:52,844 INFO L226 Difference]: Without dead ends: 31082 [2020-10-27 05:50:52,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:50:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31082 states. [2020-10-27 05:50:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31082 to 15882. [2020-10-27 05:50:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-27 05:50:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 23817 transitions. [2020-10-27 05:50:54,346 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 23817 transitions. Word has length 73 [2020-10-27 05:50:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:54,347 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 23817 transitions. [2020-10-27 05:50:54,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:50:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 23817 transitions. [2020-10-27 05:50:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:50:54,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:54,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:50:54,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:50:54,349 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:54,350 INFO L82 PathProgramCache]: Analyzing trace with hash -200449353, now seen corresponding path program 1 times [2020-10-27 05:50:54,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:54,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883213124] [2020-10-27 05:50:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:54,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:54,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:50:54,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:54,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 05:50:54,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:50:54,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:50:54,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:54,767 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:54,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:54,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:54,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:50:54,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:54,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:50:54,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883213124] [2020-10-27 05:50:54,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:54,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:50:54,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692557263] [2020-10-27 05:50:54,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:50:54,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:54,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:50:54,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:50:54,809 INFO L87 Difference]: Start difference. First operand 15882 states and 23817 transitions. Second operand 4 states. [2020-10-27 05:50:55,088 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:50:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:56,921 INFO L93 Difference]: Finished difference Result 39042 states and 58575 transitions. [2020-10-27 05:50:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:50:56,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-27 05:50:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:56,981 INFO L225 Difference]: With dead ends: 39042 [2020-10-27 05:50:56,982 INFO L226 Difference]: Without dead ends: 23199 [2020-10-27 05:50:57,017 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 05:50:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23199 states. [2020-10-27 05:50:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23199 to 23196. [2020-10-27 05:50:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23196 states. [2020-10-27 05:50:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 34651 transitions. [2020-10-27 05:50:58,528 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 34651 transitions. Word has length 74 [2020-10-27 05:50:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:58,528 INFO L481 AbstractCegarLoop]: Abstraction has 23196 states and 34651 transitions. [2020-10-27 05:50:58,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:50:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 34651 transitions. [2020-10-27 05:50:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:50:58,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:58,543 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-27 05:50:58,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:50:58,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1804316187, now seen corresponding path program 1 times [2020-10-27 05:50:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:58,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290482150] [2020-10-27 05:50:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:58,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:59,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:00,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:00,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:51:00,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:51:00,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-27 05:51:00,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:51:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:51:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:51:00,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:01,059 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:51:01,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:01,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:01,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:01,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:01,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:01,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:51:01,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:01,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:01,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:51:01,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:01,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290482150] [2020-10-27 05:51:01,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:51:01,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:51:01,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378764920] [2020-10-27 05:51:01,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:51:01,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:51:01,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:51:01,158 INFO L87 Difference]: Start difference. First operand 23196 states and 34651 transitions. Second operand 11 states. [2020-10-27 05:51:01,494 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:51:02,812 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-10-27 05:51:07,848 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:51:08,391 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:51:08,998 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:51:09,649 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:51:20,806 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:51:21,588 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184 [2020-10-27 05:51:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:25,944 INFO L93 Difference]: Finished difference Result 274148 states and 405613 transitions. [2020-10-27 05:51:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 05:51:25,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-27 05:51:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:26,947 INFO L225 Difference]: With dead ends: 274148 [2020-10-27 05:51:26,947 INFO L226 Difference]: Without dead ends: 250993 [2020-10-27 05:51:27,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 05:51:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250993 states. [2020-10-27 05:51:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250993 to 62940. [2020-10-27 05:51:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62940 states. [2020-10-27 05:51:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62940 states to 62940 states and 92695 transitions. [2020-10-27 05:51:33,969 INFO L78 Accepts]: Start accepts. Automaton has 62940 states and 92695 transitions. Word has length 99 [2020-10-27 05:51:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:33,969 INFO L481 AbstractCegarLoop]: Abstraction has 62940 states and 92695 transitions. [2020-10-27 05:51:33,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:51:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 62940 states and 92695 transitions. [2020-10-27 05:51:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:51:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:33,997 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-27 05:51:33,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:51:33,997 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash -117674894, now seen corresponding path program 1 times [2020-10-27 05:51:33,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:33,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759588511] [2020-10-27 05:51:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:34,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:34,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:51:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:51:34,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:34,944 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:51:34,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:34,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:35,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:51:35,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 05:51:35,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759588511] [2020-10-27 05:51:35,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:35,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:51:35,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872996663] [2020-10-27 05:51:35,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:51:35,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:35,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:51:35,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:51:35,047 INFO L87 Difference]: Start difference. First operand 62940 states and 92695 transitions. Second operand 6 states. [2020-10-27 05:51:35,364 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:51:37,708 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:51:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:46,850 INFO L93 Difference]: Finished difference Result 188738 states and 278003 transitions. [2020-10-27 05:51:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:51:46,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-27 05:51:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:47,169 INFO L225 Difference]: With dead ends: 188738 [2020-10-27 05:51:47,169 INFO L226 Difference]: Without dead ends: 125839 [2020-10-27 05:51:47,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:51:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125839 states. [2020-10-27 05:51:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125839 to 125836. [2020-10-27 05:51:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125836 states. [2020-10-27 05:51:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125836 states to 125836 states and 184243 transitions. [2020-10-27 05:51:58,053 INFO L78 Accepts]: Start accepts. Automaton has 125836 states and 184243 transitions. Word has length 99 [2020-10-27 05:51:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:58,053 INFO L481 AbstractCegarLoop]: Abstraction has 125836 states and 184243 transitions. [2020-10-27 05:51:58,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:51:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 125836 states and 184243 transitions. [2020-10-27 05:51:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:51:58,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:58,093 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-27 05:51:58,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:51:58,093 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2002540649, now seen corresponding path program 1 times [2020-10-27 05:51:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:58,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477102062] [2020-10-27 05:51:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:58,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:00,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:52:00,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:52:00,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:52:00,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2339 [2020-10-27 05:52:00,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:52:00,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:52:00,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:52:00,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:52:00,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:52:01,185 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:52:01,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:52:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:01,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:01,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:52:01,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:52:01,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:52:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:52:01,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477102062] [2020-10-27 05:52:01,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:52:01,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:52:01,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404469354] [2020-10-27 05:52:01,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:52:01,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:52:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:52:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:52:01,306 INFO L87 Difference]: Start difference. First operand 125836 states and 184243 transitions. Second operand 11 states. [2020-10-27 05:52:01,674 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:52:08,575 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:52:09,033 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:52:09,893 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:52:10,638 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:52:53,796 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:52:55,827 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184