/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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:10:35,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:10:35,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:10:35,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:10:35,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:10:35,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:10:35,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:10:35,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:10:35,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:10:35,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:10:35,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:10:35,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:10:35,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:10:35,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:10:35,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:10:35,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:10:35,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:10:35,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:10:35,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:10:35,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:10:35,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:10:35,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:10:35,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:10:35,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:10:35,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:10:35,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:10:35,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:10:35,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:10:35,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:10:35,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:10:35,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:10:35,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:10:35,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:10:35,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:10:35,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:10:35,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:10:35,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:10:35,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:10:35,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:10:35,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:10:35,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:10:35,391 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 05:10:35,440 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:10:35,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:10:35,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:10:35,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:10:35,446 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:10:35,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:10:35,447 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:10:35,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:10:35,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:10:35,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:10:35,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:10:35,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:10:35,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:10:35,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:10:35,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:10:35,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:10:35,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:10:35,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:10:35,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:10:35,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:10:35,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:10:35,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:10:35,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:10:35,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:10:35,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:10:35,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:10:35,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:10:35,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:10:35,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:10:35,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:10:35,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:10:35,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:10:35,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:10:35,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:10:35,964 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:10:35,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:10:36,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4728ea6c/a7c62bf3472f4811905dfba04cd30aca/FLAGad7d34227 [2020-10-27 05:10:36,702 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:10:36,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:10:36,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4728ea6c/a7c62bf3472f4811905dfba04cd30aca/FLAGad7d34227 [2020-10-27 05:10:37,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4728ea6c/a7c62bf3472f4811905dfba04cd30aca [2020-10-27 05:10:37,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:10:37,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:10:37,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:10:37,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:10:37,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:10:37,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b1939c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37, skipping insertion in model container [2020-10-27 05:10:37,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:10:37,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:10:37,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:10:37,469 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:10:37,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:10:37,565 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:10:37,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37 WrapperNode [2020-10-27 05:10:37,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:10:37,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:10:37,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:10:37,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:10:37,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (1/1) ... [2020-10-27 05:10:37,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:10:37,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:10:37,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:10:37,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:10:37,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (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 05:10:37,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:10:37,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:10:37,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:10:37,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:10:37,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:10:37,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:10:37,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:10:37,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:10:37,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:10:37,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:10:37,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:10:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:10:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:10:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:10:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:10:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:10:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:10:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:10:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:10:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:10:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:10:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:10:38,938 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:10:38,939 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:10:38,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:10:38 BoogieIcfgContainer [2020-10-27 05:10:38,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:10:38,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:10:38,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:10:38,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:10:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:10:37" (1/3) ... [2020-10-27 05:10:38,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d91fc1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:10:38, skipping insertion in model container [2020-10-27 05:10:38,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:37" (2/3) ... [2020-10-27 05:10:38,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d91fc1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:10:38, skipping insertion in model container [2020-10-27 05:10:38,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:10:38" (3/3) ... [2020-10-27 05:10:38,953 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:10:38,965 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:10:38,970 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:10:38,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:10:39,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:10:39,012 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:10:39,012 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:10:39,012 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:10:39,012 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:10:39,012 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:10:39,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:10:39,013 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:10:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-27 05:10:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:10:39,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:39,043 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] [2020-10-27 05:10:39,044 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1104418387, now seen corresponding path program 1 times [2020-10-27 05:10:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:39,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576926705] [2020-10-27 05:10:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:39,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:39,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:40,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:40,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:40,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:44,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:10:44,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:10:44,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:10:44,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:10:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 05:10:44,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:10:44,861 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:10:44,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:44,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:44,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:44,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:44,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 05:10:44,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:44,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:44,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:44,985 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 05:10:44,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576926705] [2020-10-27 05:10:44,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:44,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:10:44,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313295086] [2020-10-27 05:10:44,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:10:44,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:45,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:10:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:10:45,014 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-27 05:10:45,430 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:10:46,201 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:10:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:46,530 INFO L93 Difference]: Finished difference Result 269 states and 438 transitions. [2020-10-27 05:10:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:10:46,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 05:10:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:46,546 INFO L225 Difference]: With dead ends: 269 [2020-10-27 05:10:46,546 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 05:10:46,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:10:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 05:10:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2020-10-27 05:10:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 05:10:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 231 transitions. [2020-10-27 05:10:46,622 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 231 transitions. Word has length 52 [2020-10-27 05:10:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:46,623 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 231 transitions. [2020-10-27 05:10:46,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:10:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 231 transitions. [2020-10-27 05:10:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:10:46,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:46,626 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] [2020-10-27 05:10:46,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:10:46,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2005386002, now seen corresponding path program 1 times [2020-10-27 05:10:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:46,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121175404] [2020-10-27 05:10:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:46,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:48,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:51,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:51,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:10:51,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:10:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:10:51,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:10:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:10:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:52,091 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:10:52,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:52,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:52,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:52,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:52,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:10:52,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:52,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:52,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:52,172 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 05:10:52,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121175404] [2020-10-27 05:10:52,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:52,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:10:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150118508] [2020-10-27 05:10:52,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:10:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:10:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:10:52,178 INFO L87 Difference]: Start difference. First operand 163 states and 231 transitions. Second operand 11 states. [2020-10-27 05:10:52,492 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:10:53,428 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:10:53,655 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:10:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:54,209 INFO L93 Difference]: Finished difference Result 319 states and 467 transitions. [2020-10-27 05:10:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:10:54,211 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 05:10:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:54,215 INFO L225 Difference]: With dead ends: 319 [2020-10-27 05:10:54,215 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 05:10:54,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:10:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 05:10:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-10-27 05:10:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 05:10:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 229 transitions. [2020-10-27 05:10:54,269 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 229 transitions. Word has length 53 [2020-10-27 05:10:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:54,270 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 229 transitions. [2020-10-27 05:10:54,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:10:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 229 transitions. [2020-10-27 05:10:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:10:54,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:54,276 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] [2020-10-27 05:10:54,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:10:54,276 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash -16149018, now seen corresponding path program 1 times [2020-10-27 05:10:54,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:54,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397022301] [2020-10-27 05:10:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:54,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:54,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:59,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:59,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:10:59,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:10:59,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:10:59,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:10:59,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:59,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:10:59,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:59,606 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:10:59,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:59,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:59,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:59,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:59,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:10:59,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:59,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:59,669 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 05:10:59,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397022301] [2020-10-27 05:10:59,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:59,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:10:59,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571952679] [2020-10-27 05:10:59,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:10:59,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:10:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:10:59,674 INFO L87 Difference]: Start difference. First operand 163 states and 229 transitions. Second operand 6 states. [2020-10-27 05:10:59,902 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:11:00,410 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:11:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:00,716 INFO L93 Difference]: Finished difference Result 388 states and 567 transitions. [2020-10-27 05:11:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:11:00,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:11:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:00,722 INFO L225 Difference]: With dead ends: 388 [2020-10-27 05:11:00,722 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 05:11:00,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 05:11:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 254. [2020-10-27 05:11:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 05:11:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 367 transitions. [2020-10-27 05:11:00,811 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 367 transitions. Word has length 54 [2020-10-27 05:11:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:00,817 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 367 transitions. [2020-10-27 05:11:00,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 367 transitions. [2020-10-27 05:11:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:11:00,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:00,822 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] [2020-10-27 05:11:00,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:11:00,825 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:00,826 INFO L82 PathProgramCache]: Analyzing trace with hash -927204155, now seen corresponding path program 1 times [2020-10-27 05:11:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:00,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303195580] [2020-10-27 05:11:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:05,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:05,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:11:05,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:11:05,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:11:05,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:11:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:11:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:06,213 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:06,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:06,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:06,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:06,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:06,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:06,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:11:06,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:06,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:06,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:06,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:06,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:06,271 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 05:11:06,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303195580] [2020-10-27 05:11:06,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:06,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:11:06,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381741858] [2020-10-27 05:11:06,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:11:06,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:06,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:11:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:06,274 INFO L87 Difference]: Start difference. First operand 254 states and 367 transitions. Second operand 10 states. [2020-10-27 05:11:06,543 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:11:07,280 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:11:07,502 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:11:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:07,863 INFO L93 Difference]: Finished difference Result 527 states and 785 transitions. [2020-10-27 05:11:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:11:07,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 05:11:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:07,866 INFO L225 Difference]: With dead ends: 527 [2020-10-27 05:11:07,867 INFO L226 Difference]: Without dead ends: 340 [2020-10-27 05:11:07,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:11:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-27 05:11:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 254. [2020-10-27 05:11:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 05:11:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 366 transitions. [2020-10-27 05:11:07,902 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 366 transitions. Word has length 55 [2020-10-27 05:11:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:07,902 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 366 transitions. [2020-10-27 05:11:07,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 366 transitions. [2020-10-27 05:11:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:11:07,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:07,904 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] [2020-10-27 05:11:07,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:11:07,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:07,905 INFO L82 PathProgramCache]: Analyzing trace with hash 123257501, now seen corresponding path program 1 times [2020-10-27 05:11:07,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:07,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608144223] [2020-10-27 05:11:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:09,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:11:09,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:11:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-27 05:11:09,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:09,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:11:09,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:09,372 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:09,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:09,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:09,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:09,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:09,415 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 05:11:09,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608144223] [2020-10-27 05:11:09,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:09,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:09,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075030566] [2020-10-27 05:11:09,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:09,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:09,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:09,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:09,418 INFO L87 Difference]: Start difference. First operand 254 states and 366 transitions. Second operand 6 states. [2020-10-27 05:11:09,654 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:11:10,096 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:11:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:10,545 INFO L93 Difference]: Finished difference Result 673 states and 997 transitions. [2020-10-27 05:11:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:11:10,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:11:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:10,552 INFO L225 Difference]: With dead ends: 673 [2020-10-27 05:11:10,553 INFO L226 Difference]: Without dead ends: 449 [2020-10-27 05:11:10,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-27 05:11:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 444. [2020-10-27 05:11:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-27 05:11:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 653 transitions. [2020-10-27 05:11:10,618 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 653 transitions. Word has length 56 [2020-10-27 05:11:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:10,620 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 653 transitions. [2020-10-27 05:11:10,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 653 transitions. [2020-10-27 05:11:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:11:10,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:10,629 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] [2020-10-27 05:11:10,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:11:10,630 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash 699272331, now seen corresponding path program 1 times [2020-10-27 05:11:10,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:10,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132941905] [2020-10-27 05:11:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:11,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:11,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:13,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:13,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:11:13,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:11:13,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3239 [2020-10-27 05:11:13,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:13,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:11:13,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:13,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:11:13,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:14,317 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:14,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:14,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:14,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:14,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:14,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:11:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:14,377 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 05:11:14,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132941905] [2020-10-27 05:11:14,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:14,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:11:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644221377] [2020-10-27 05:11:14,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:11:14,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:11:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:11:14,382 INFO L87 Difference]: Start difference. First operand 444 states and 653 transitions. Second operand 13 states. [2020-10-27 05:11:14,679 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:11:15,805 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:11:16,090 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:11:18,251 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:11:18,522 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:11:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:18,924 INFO L93 Difference]: Finished difference Result 2814 states and 4227 transitions. [2020-10-27 05:11:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:11:18,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 05:11:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:18,940 INFO L225 Difference]: With dead ends: 2814 [2020-10-27 05:11:18,940 INFO L226 Difference]: Without dead ends: 2481 [2020-10-27 05:11:18,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 05:11:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-10-27 05:11:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 444. [2020-10-27 05:11:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-27 05:11:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 651 transitions. [2020-10-27 05:11:19,040 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 651 transitions. Word has length 57 [2020-10-27 05:11:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:19,040 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 651 transitions. [2020-10-27 05:11:19,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:11:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 651 transitions. [2020-10-27 05:11:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:11:19,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:19,042 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] [2020-10-27 05:11:19,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:11:19,042 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1123215619, now seen corresponding path program 1 times [2020-10-27 05:11:19,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:19,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44033418] [2020-10-27 05:11:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:21,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:11:21,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:11:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2884 [2020-10-27 05:11:21,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:11:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:11:21,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:11:22,489 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-27 05:11:23,140 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:23,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:23,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:23,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:23,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:23,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:11:23,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:23,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:23,194 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 05:11:23,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44033418] [2020-10-27 05:11:23,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:23,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-27 05:11:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166222117] [2020-10-27 05:11:23,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:11:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:11:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:11:23,202 INFO L87 Difference]: Start difference. First operand 444 states and 651 transitions. Second operand 18 states. [2020-10-27 05:11:23,376 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-27 05:11:24,094 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 180 [2020-10-27 05:11:24,579 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-27 05:11:24,810 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 05:11:25,143 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-27 05:11:26,423 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:11:26,745 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:11:27,019 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:11:27,323 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:11:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:29,039 INFO L93 Difference]: Finished difference Result 2238 states and 3405 transitions. [2020-10-27 05:11:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 05:11:29,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-27 05:11:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:29,051 INFO L225 Difference]: With dead ends: 2238 [2020-10-27 05:11:29,051 INFO L226 Difference]: Without dead ends: 1893 [2020-10-27 05:11:29,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:11:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2020-10-27 05:11:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 459. [2020-10-27 05:11:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-27 05:11:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 669 transitions. [2020-10-27 05:11:29,159 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 669 transitions. Word has length 58 [2020-10-27 05:11:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:29,159 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 669 transitions. [2020-10-27 05:11:29,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 05:11:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 669 transitions. [2020-10-27 05:11:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:11:29,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:29,160 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] [2020-10-27 05:11:29,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:11:29,161 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash 150909223, now seen corresponding path program 1 times [2020-10-27 05:11:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:29,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708764580] [2020-10-27 05:11:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:29,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:29,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:29,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:31,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:31,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:32,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:33,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:33,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:34,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:11:34,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:34,734 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:34,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:34,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:34,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:34,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:34,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:11:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:34,795 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 05:11:34,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708764580] [2020-10-27 05:11:34,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:34,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:11:34,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661787611] [2020-10-27 05:11:34,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:11:34,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:34,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:11:34,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:11:34,801 INFO L87 Difference]: Start difference. First operand 459 states and 669 transitions. Second operand 16 states. [2020-10-27 05:11:35,151 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:11:36,764 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:11:37,016 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:11:37,367 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:11:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:38,758 INFO L93 Difference]: Finished difference Result 1053 states and 1572 transitions. [2020-10-27 05:11:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:11:38,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-27 05:11:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:38,763 INFO L225 Difference]: With dead ends: 1053 [2020-10-27 05:11:38,763 INFO L226 Difference]: Without dead ends: 720 [2020-10-27 05:11:38,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:11:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2020-10-27 05:11:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 459. [2020-10-27 05:11:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-27 05:11:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 666 transitions. [2020-10-27 05:11:38,859 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 666 transitions. Word has length 58 [2020-10-27 05:11:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:38,859 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 666 transitions. [2020-10-27 05:11:38,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:11:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 666 transitions. [2020-10-27 05:11:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:11:38,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:38,861 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] [2020-10-27 05:11:38,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:11:38,861 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:38,861 INFO L82 PathProgramCache]: Analyzing trace with hash -558687800, now seen corresponding path program 1 times [2020-10-27 05:11:38,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:38,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318369034] [2020-10-27 05:11:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:39,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:11:39,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:11:39,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-27 05:11:39,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:11:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:11:39,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:39,429 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:39,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:39,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:39,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:39,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:11:39,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:39,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:39,464 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 05:11:39,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318369034] [2020-10-27 05:11:39,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:39,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:11:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912228843] [2020-10-27 05:11:39,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:39,467 INFO L87 Difference]: Start difference. First operand 459 states and 666 transitions. Second operand 6 states. [2020-10-27 05:11:39,697 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:11:40,185 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:11:40,383 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:11:41,623 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:11:41,825 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:11:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:41,875 INFO L93 Difference]: Finished difference Result 2404 states and 3671 transitions. [2020-10-27 05:11:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:11:41,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-27 05:11:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:41,887 INFO L225 Difference]: With dead ends: 2404 [2020-10-27 05:11:41,887 INFO L226 Difference]: Without dead ends: 2085 [2020-10-27 05:11:41,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:11:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-10-27 05:11:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 786. [2020-10-27 05:11:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-10-27 05:11:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1154 transitions. [2020-10-27 05:11:42,057 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1154 transitions. Word has length 59 [2020-10-27 05:11:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:42,057 INFO L481 AbstractCegarLoop]: Abstraction has 786 states and 1154 transitions. [2020-10-27 05:11:42,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1154 transitions. [2020-10-27 05:11:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:11:42,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:42,058 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] [2020-10-27 05:11:42,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:11:42,059 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:42,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash 734757896, now seen corresponding path program 1 times [2020-10-27 05:11:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:42,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827203774] [2020-10-27 05:11:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:42,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:47,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:11:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:47,472 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 05:11:47,788 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2020-10-27 05:11:48,217 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:48,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:48,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:48,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:48,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:11:48,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:48,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:48,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:48,272 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 05:11:48,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827203774] [2020-10-27 05:11:48,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:48,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-27 05:11:48,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134987329] [2020-10-27 05:11:48,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:11:48,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:11:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:11:48,278 INFO L87 Difference]: Start difference. First operand 786 states and 1154 transitions. Second operand 18 states. [2020-10-27 05:11:48,517 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-27 05:11:49,312 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 188 [2020-10-27 05:11:49,864 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 05:11:50,136 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-27 05:11:50,553 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2020-10-27 05:11:51,834 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:11:52,103 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:11:52,382 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:11:52,743 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:11:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:55,214 INFO L93 Difference]: Finished difference Result 4395 states and 6650 transitions. [2020-10-27 05:11:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:11:55,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-27 05:11:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:55,235 INFO L225 Difference]: With dead ends: 4395 [2020-10-27 05:11:55,235 INFO L226 Difference]: Without dead ends: 3746 [2020-10-27 05:11:55,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:11:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2020-10-27 05:11:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 780. [2020-10-27 05:11:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 05:11:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1144 transitions. [2020-10-27 05:11:55,439 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1144 transitions. Word has length 59 [2020-10-27 05:11:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:55,439 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1144 transitions. [2020-10-27 05:11:55,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 05:11:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1144 transitions. [2020-10-27 05:11:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:11:55,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:55,441 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] [2020-10-27 05:11:55,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:11:55,441 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1145372728, now seen corresponding path program 1 times [2020-10-27 05:11:55,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:55,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945533070] [2020-10-27 05:11:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:55,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:55,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:11:55,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:11:55,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 05:11:55,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:55,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:11:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:11:55,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:55,975 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:55,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:55,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:55,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:55,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:55,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:11:55,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:55,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:56,036 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 05:11:56,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945533070] [2020-10-27 05:11:56,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:56,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:11:56,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888861123] [2020-10-27 05:11:56,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:56,038 INFO L87 Difference]: Start difference. First operand 780 states and 1144 transitions. Second operand 6 states. [2020-10-27 05:11:56,318 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:11:56,846 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:11:57,087 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:11:58,269 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:11:58,478 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:11:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:58,546 INFO L93 Difference]: Finished difference Result 2714 states and 4085 transitions. [2020-10-27 05:11:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:11:58,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-27 05:11:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:58,557 INFO L225 Difference]: With dead ends: 2714 [2020-10-27 05:11:58,557 INFO L226 Difference]: Without dead ends: 2077 [2020-10-27 05:11:58,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:11:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-10-27 05:11:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 786. [2020-10-27 05:11:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-10-27 05:11:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1141 transitions. [2020-10-27 05:11:58,759 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1141 transitions. Word has length 60 [2020-10-27 05:11:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:58,760 INFO L481 AbstractCegarLoop]: Abstraction has 786 states and 1141 transitions. [2020-10-27 05:11:58,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1141 transitions. [2020-10-27 05:11:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:11:58,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:58,761 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] [2020-10-27 05:11:58,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:11:58,761 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:58,762 INFO L82 PathProgramCache]: Analyzing trace with hash 745342820, now seen corresponding path program 1 times [2020-10-27 05:11:58,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:58,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209796624] [2020-10-27 05:11:58,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:01,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:12:01,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:12:01,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2848 [2020-10-27 05:12:01,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:01,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:12:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:02,123 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:02,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:02,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:02,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:02,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:02,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:12:02,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:02,159 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 05:12:02,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209796624] [2020-10-27 05:12:02,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:02,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73435277] [2020-10-27 05:12:02,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:02,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:02,161 INFO L87 Difference]: Start difference. First operand 786 states and 1141 transitions. Second operand 10 states. [2020-10-27 05:12:02,490 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:12:03,576 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:12:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:04,359 INFO L93 Difference]: Finished difference Result 1773 states and 2626 transitions. [2020-10-27 05:12:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:04,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:12:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:04,364 INFO L225 Difference]: With dead ends: 1773 [2020-10-27 05:12:04,364 INFO L226 Difference]: Without dead ends: 1097 [2020-10-27 05:12:04,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:12:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2020-10-27 05:12:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 771. [2020-10-27 05:12:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-27 05:12:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1119 transitions. [2020-10-27 05:12:04,586 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1119 transitions. Word has length 60 [2020-10-27 05:12:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:04,586 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1119 transitions. [2020-10-27 05:12:04,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1119 transitions. [2020-10-27 05:12:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:12:04,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:04,589 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] [2020-10-27 05:12:04,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:12:04,590 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -771499104, now seen corresponding path program 1 times [2020-10-27 05:12:04,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:04,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570947366] [2020-10-27 05:12:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:06,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:12:06,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:12:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583 [2020-10-27 05:12:06,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:06,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:06,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:06,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:06,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:06,679 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:06,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:06,710 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 05:12:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570947366] [2020-10-27 05:12:06,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:06,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:06,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337221110] [2020-10-27 05:12:06,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:06,712 INFO L87 Difference]: Start difference. First operand 771 states and 1119 transitions. Second operand 10 states. [2020-10-27 05:12:06,998 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:12:07,886 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:08,124 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:12:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:08,863 INFO L93 Difference]: Finished difference Result 1743 states and 2583 transitions. [2020-10-27 05:12:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:12:08,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:12:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:08,868 INFO L225 Difference]: With dead ends: 1743 [2020-10-27 05:12:08,868 INFO L226 Difference]: Without dead ends: 1088 [2020-10-27 05:12:08,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:12:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2020-10-27 05:12:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 762. [2020-10-27 05:12:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2020-10-27 05:12:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1103 transitions. [2020-10-27 05:12:09,141 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1103 transitions. Word has length 60 [2020-10-27 05:12:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:09,142 INFO L481 AbstractCegarLoop]: Abstraction has 762 states and 1103 transitions. [2020-10-27 05:12:09,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1103 transitions. [2020-10-27 05:12:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:12:09,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:09,143 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] [2020-10-27 05:12:09,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:12:09,143 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:09,144 INFO L82 PathProgramCache]: Analyzing trace with hash 284024675, now seen corresponding path program 1 times [2020-10-27 05:12:09,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:09,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446911943] [2020-10-27 05:12:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:09,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:09,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:09,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1340 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:12:10,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:10,971 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:10,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:10,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:10,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:11,026 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 05:12:11,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446911943] [2020-10-27 05:12:11,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:11,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:11,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550140417] [2020-10-27 05:12:11,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:11,027 INFO L87 Difference]: Start difference. First operand 762 states and 1103 transitions. Second operand 9 states. [2020-10-27 05:12:11,312 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:12:12,694 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:12:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:12,797 INFO L93 Difference]: Finished difference Result 1720 states and 2551 transitions. [2020-10-27 05:12:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:12:12,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-27 05:12:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:12,802 INFO L225 Difference]: With dead ends: 1720 [2020-10-27 05:12:12,802 INFO L226 Difference]: Without dead ends: 1050 [2020-10-27 05:12:12,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:12:12,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-10-27 05:12:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 727. [2020-10-27 05:12:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-10-27 05:12:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1059 transitions. [2020-10-27 05:12:13,040 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1059 transitions. Word has length 60 [2020-10-27 05:12:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:13,040 INFO L481 AbstractCegarLoop]: Abstraction has 727 states and 1059 transitions. [2020-10-27 05:12:13,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1059 transitions. [2020-10-27 05:12:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:12:13,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:13,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:13,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:12:13,043 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 901500745, now seen corresponding path program 1 times [2020-10-27 05:12:13,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:13,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554326652] [2020-10-27 05:12:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:13,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:12:18,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:18,305 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:18,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:18,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:18,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:18,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:18,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:12:18,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:18,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:18,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:18,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:18,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:18,367 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 05:12:18,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554326652] [2020-10-27 05:12:18,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:18,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:18,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10324815] [2020-10-27 05:12:18,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:18,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:18,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:18,369 INFO L87 Difference]: Start difference. First operand 727 states and 1059 transitions. Second operand 6 states. [2020-10-27 05:12:18,612 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:12:19,491 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:12:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:19,556 INFO L93 Difference]: Finished difference Result 1686 states and 2509 transitions. [2020-10-27 05:12:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:12:19,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:12:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:19,562 INFO L225 Difference]: With dead ends: 1686 [2020-10-27 05:12:19,562 INFO L226 Difference]: Without dead ends: 1051 [2020-10-27 05:12:19,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-10-27 05:12:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 752. [2020-10-27 05:12:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-10-27 05:12:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1085 transitions. [2020-10-27 05:12:19,854 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1085 transitions. Word has length 81 [2020-10-27 05:12:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:19,854 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 1085 transitions. [2020-10-27 05:12:19,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1085 transitions. [2020-10-27 05:12:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:12:19,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:19,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:19,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:12:19,857 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1875463854, now seen corresponding path program 1 times [2020-10-27 05:12:19,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:19,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569301972] [2020-10-27 05:12:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:19,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:12:24,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:12:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:12:24,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:12:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:12:24,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:25,283 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:25,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:25,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:25,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:25,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:12:25,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:25,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:25,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:25,341 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 05:12:25,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569301972] [2020-10-27 05:12:25,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:25,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:12:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172985085] [2020-10-27 05:12:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:12:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:12:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:12:25,343 INFO L87 Difference]: Start difference. First operand 752 states and 1085 transitions. Second operand 12 states. [2020-10-27 05:12:25,681 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:29,145 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:12:29,405 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:12:29,664 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:12:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:31,174 INFO L93 Difference]: Finished difference Result 4588 states and 6720 transitions. [2020-10-27 05:12:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:12:31,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-27 05:12:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:31,189 INFO L225 Difference]: With dead ends: 4588 [2020-10-27 05:12:31,189 INFO L226 Difference]: Without dead ends: 3953 [2020-10-27 05:12:31,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 05:12:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2020-10-27 05:12:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 918. [2020-10-27 05:12:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-10-27 05:12:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1339 transitions. [2020-10-27 05:12:31,523 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1339 transitions. Word has length 81 [2020-10-27 05:12:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:31,523 INFO L481 AbstractCegarLoop]: Abstraction has 918 states and 1339 transitions. [2020-10-27 05:12:31,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:12:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1339 transitions. [2020-10-27 05:12:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:12:31,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:31,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:31,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:12:31,526 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1150149004, now seen corresponding path program 1 times [2020-10-27 05:12:31,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:31,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59694478] [2020-10-27 05:12:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:31,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:12:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:33,656 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:33,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:33,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:33,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:33,688 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 05:12:33,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59694478] [2020-10-27 05:12:33,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:33,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:12:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484212191] [2020-10-27 05:12:33,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:33,690 INFO L87 Difference]: Start difference. First operand 918 states and 1339 transitions. Second operand 6 states. [2020-10-27 05:12:33,922 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:12:34,790 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:12:35,360 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:12:35,570 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:12:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:35,771 INFO L93 Difference]: Finished difference Result 3397 states and 5085 transitions. [2020-10-27 05:12:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:12:35,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:12:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:35,784 INFO L225 Difference]: With dead ends: 3397 [2020-10-27 05:12:35,785 INFO L226 Difference]: Without dead ends: 2762 [2020-10-27 05:12:35,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:12:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2020-10-27 05:12:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1834. [2020-10-27 05:12:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1834 states. [2020-10-27 05:12:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2711 transitions. [2020-10-27 05:12:36,446 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2711 transitions. Word has length 81 [2020-10-27 05:12:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:36,446 INFO L481 AbstractCegarLoop]: Abstraction has 1834 states and 2711 transitions. [2020-10-27 05:12:36,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2711 transitions. [2020-10-27 05:12:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:12:36,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:36,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:36,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:12:36,448 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash 669269346, now seen corresponding path program 1 times [2020-10-27 05:12:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:36,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030442342] [2020-10-27 05:12:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:36,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:37,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:12:37,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:37,905 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:37,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:37,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:37,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:37,939 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 05:12:37,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030442342] [2020-10-27 05:12:37,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:37,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:37,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68662250] [2020-10-27 05:12:37,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:12:37,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:37,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:12:37,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:12:37,941 INFO L87 Difference]: Start difference. First operand 1834 states and 2711 transitions. Second operand 5 states. [2020-10-27 05:12:38,200 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:39,178 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:12:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:39,883 INFO L93 Difference]: Finished difference Result 4886 states and 7267 transitions. [2020-10-27 05:12:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:12:39,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-27 05:12:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:39,895 INFO L225 Difference]: With dead ends: 4886 [2020-10-27 05:12:39,895 INFO L226 Difference]: Without dead ends: 3217 [2020-10-27 05:12:39,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:12:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2020-10-27 05:12:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 3174. [2020-10-27 05:12:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-10-27 05:12:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 4612 transitions. [2020-10-27 05:12:40,932 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 4612 transitions. Word has length 81 [2020-10-27 05:12:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:40,933 INFO L481 AbstractCegarLoop]: Abstraction has 3174 states and 4612 transitions. [2020-10-27 05:12:40,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:12:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 4612 transitions. [2020-10-27 05:12:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:12:40,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:40,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:40,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:12:40,937 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1306658626, now seen corresponding path program 1 times [2020-10-27 05:12:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:40,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224682553] [2020-10-27 05:12:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:41,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:12:41,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:12:41,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 05:12:41,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:41,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:41,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 05:12:41,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 05:12:41,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:41,646 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:41,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:41,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:41,672 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 05:12:41,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224682553] [2020-10-27 05:12:41,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:41,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:12:41,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287930301] [2020-10-27 05:12:41,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:12:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:12:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:12:41,674 INFO L87 Difference]: Start difference. First operand 3174 states and 4612 transitions. Second operand 4 states. [2020-10-27 05:12:41,893 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:12:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:44,403 INFO L93 Difference]: Finished difference Result 8556 states and 12408 transitions. [2020-10-27 05:12:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:12:44,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:12:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:44,417 INFO L225 Difference]: With dead ends: 8556 [2020-10-27 05:12:44,417 INFO L226 Difference]: Without dead ends: 5636 [2020-10-27 05:12:44,421 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 05:12:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2020-10-27 05:12:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 5216. [2020-10-27 05:12:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2020-10-27 05:12:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 7477 transitions. [2020-10-27 05:12:46,208 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 7477 transitions. Word has length 82 [2020-10-27 05:12:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:46,208 INFO L481 AbstractCegarLoop]: Abstraction has 5216 states and 7477 transitions. [2020-10-27 05:12:46,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:12:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 7477 transitions. [2020-10-27 05:12:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:12:46,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:46,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:46,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:12:46,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1856579654, now seen corresponding path program 1 times [2020-10-27 05:12:46,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:46,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154647362] [2020-10-27 05:12:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 05:12:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 05:12:46,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:46,683 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:46,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:46,714 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 05:12:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154647362] [2020-10-27 05:12:46,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:46,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:12:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607444246] [2020-10-27 05:12:46,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:12:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:12:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:12:46,716 INFO L87 Difference]: Start difference. First operand 5216 states and 7477 transitions. Second operand 4 states. [2020-10-27 05:12:46,947 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:12:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:50,764 INFO L93 Difference]: Finished difference Result 14774 states and 21065 transitions. [2020-10-27 05:12:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:12:50,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:12:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:50,787 INFO L225 Difference]: With dead ends: 14774 [2020-10-27 05:12:50,787 INFO L226 Difference]: Without dead ends: 9675 [2020-10-27 05:12:50,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:12:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9675 states. [2020-10-27 05:12:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9675 to 9112. [2020-10-27 05:12:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9112 states. [2020-10-27 05:12:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 12829 transitions. [2020-10-27 05:12:54,189 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 12829 transitions. Word has length 83 [2020-10-27 05:12:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:54,189 INFO L481 AbstractCegarLoop]: Abstraction has 9112 states and 12829 transitions. [2020-10-27 05:12:54,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:12:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 12829 transitions. [2020-10-27 05:12:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:12:54,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:54,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:54,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:12:54,192 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1652962825, now seen corresponding path program 1 times [2020-10-27 05:12:54,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:54,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126441540] [2020-10-27 05:12:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:54,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:54,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:54,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:12:54,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:54,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 05:12:54,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 05:12:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 05:12:54,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:54,646 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:54,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:54,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:54,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:54,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:54,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:12:54,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:54,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:54,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:54,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:54,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:54,669 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 05:12:54,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126441540] [2020-10-27 05:12:54,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:54,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:12:54,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259263810] [2020-10-27 05:12:54,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:54,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:54,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:54,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:54,671 INFO L87 Difference]: Start difference. First operand 9112 states and 12829 transitions. Second operand 6 states. [2020-10-27 05:13:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:00,975 INFO L93 Difference]: Finished difference Result 15411 states and 21483 transitions. [2020-10-27 05:13:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:13:00,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-27 05:13:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:01,005 INFO L225 Difference]: With dead ends: 15411 [2020-10-27 05:13:01,005 INFO L226 Difference]: Without dead ends: 15408 [2020-10-27 05:13:01,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15408 states. [2020-10-27 05:13:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15408 to 9496. [2020-10-27 05:13:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9496 states. [2020-10-27 05:13:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9496 states to 9496 states and 13149 transitions. [2020-10-27 05:13:04,791 INFO L78 Accepts]: Start accepts. Automaton has 9496 states and 13149 transitions. Word has length 84 [2020-10-27 05:13:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:04,791 INFO L481 AbstractCegarLoop]: Abstraction has 9496 states and 13149 transitions. [2020-10-27 05:13:04,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9496 states and 13149 transitions. [2020-10-27 05:13:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:13:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:04,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:04,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:13:04,794 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash -88797290, now seen corresponding path program 1 times [2020-10-27 05:13:04,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:04,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264730452] [2020-10-27 05:13:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:04,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:09,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:13:09,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:10,202 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:10,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:10,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:10,247 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 05:13:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264730452] [2020-10-27 05:13:10,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:10,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:13:10,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030402124] [2020-10-27 05:13:10,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:13:10,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:10,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:13:10,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:13:10,249 INFO L87 Difference]: Start difference. First operand 9496 states and 13149 transitions. Second operand 8 states. [2020-10-27 05:13:10,475 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:13:11,320 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:13,123 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:16,966 INFO L93 Difference]: Finished difference Result 23423 states and 32418 transitions. [2020-10-27 05:13:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:16,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-27 05:13:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:16,995 INFO L225 Difference]: With dead ends: 23423 [2020-10-27 05:13:16,995 INFO L226 Difference]: Without dead ends: 14044 [2020-10-27 05:13:17,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14044 states. [2020-10-27 05:13:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14044 to 9256. [2020-10-27 05:13:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9256 states. [2020-10-27 05:13:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9256 states to 9256 states and 12589 transitions. [2020-10-27 05:13:20,605 INFO L78 Accepts]: Start accepts. Automaton has 9256 states and 12589 transitions. Word has length 84 [2020-10-27 05:13:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:20,606 INFO L481 AbstractCegarLoop]: Abstraction has 9256 states and 12589 transitions. [2020-10-27 05:13:20,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:13:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 9256 states and 12589 transitions. [2020-10-27 05:13:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:13:20,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:20,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:20,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:13:20,608 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -372456500, now seen corresponding path program 1 times [2020-10-27 05:13:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:20,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671820069] [2020-10-27 05:13:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:20,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:13:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:21,326 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:21,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:21,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:21,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:21,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:21,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:13:21,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:21,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:21,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:21,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:21,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:21,368 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 05:13:21,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671820069] [2020-10-27 05:13:21,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:21,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:21,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278565855] [2020-10-27 05:13:21,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:21,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:21,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:21,371 INFO L87 Difference]: Start difference. First operand 9256 states and 12589 transitions. Second operand 6 states. [2020-10-27 05:13:21,602 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:13:23,513 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:13:23,937 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:13:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:27,746 INFO L93 Difference]: Finished difference Result 19073 states and 26259 transitions. [2020-10-27 05:13:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:13:27,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-27 05:13:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:27,769 INFO L225 Difference]: With dead ends: 19073 [2020-10-27 05:13:27,769 INFO L226 Difference]: Without dead ends: 13894 [2020-10-27 05:13:27,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13894 states. [2020-10-27 05:13:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13894 to 13728. [2020-10-27 05:13:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13728 states. [2020-10-27 05:13:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13728 states to 13728 states and 18509 transitions. [2020-10-27 05:13:33,088 INFO L78 Accepts]: Start accepts. Automaton has 13728 states and 18509 transitions. Word has length 85 [2020-10-27 05:13:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:33,088 INFO L481 AbstractCegarLoop]: Abstraction has 13728 states and 18509 transitions. [2020-10-27 05:13:33,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 13728 states and 18509 transitions. [2020-10-27 05:13:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 05:13:33,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:33,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1] [2020-10-27 05:13:33,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:13:33,098 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1499453307, now seen corresponding path program 1 times [2020-10-27 05:13:33,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:33,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174491447] [2020-10-27 05:13:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:33,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:38,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 05:13:38,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:13:38,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:13:38,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 05:13:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 05:13:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:39,483 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:39,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:39,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:39,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:39,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:39,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174491447] [2020-10-27 05:13:39,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:13:39,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 05:13:39,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593593685] [2020-10-27 05:13:39,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 05:13:39,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:39,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 05:13:39,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:13:39,542 INFO L87 Difference]: Start difference. First operand 13728 states and 18509 transitions. Second operand 19 states. [2020-10-27 05:13:40,074 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:41,364 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-27 05:13:41,608 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-27 05:13:41,777 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-27 05:13:42,112 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-27 05:13:42,629 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 05:13:43,062 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:13:43,406 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:13:43,853 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 05:13:44,671 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:13:45,086 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 05:13:45,579 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-27 05:13:45,889 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-27 05:13:46,347 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 05:13:49,203 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-27 05:13:49,743 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 05:13:49,943 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-10-27 05:13:52,517 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-27 05:13:52,911 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:13:55,380 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-27 05:13:56,045 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-27 05:13:56,501 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 05:14:00,426 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-27 05:14:01,293 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 05:14:01,685 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-27 05:14:01,959 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-27 05:14:02,322 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 05:14:02,700 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 05:14:05,239 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:14:05,749 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-27 05:14:10,429 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-27 05:14:10,759 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-27 05:14:11,265 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 05:14:11,904 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-27 05:14:14,396 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:14:14,686 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-27 05:14:17,192 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 05:14:17,571 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 05:14:18,056 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-27 05:14:18,779 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:14:19,153 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-27 05:14:19,761 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 05:14:20,561 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50