/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:35:09,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:35:09,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:35:09,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:35:09,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:35:09,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:35:09,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:35:09,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:35:09,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:35:09,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:35:09,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:35:09,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:35:09,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:35:09,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:35:09,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:35:09,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:35:09,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:35:09,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:35:09,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:35:09,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:35:09,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:35:09,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:35:09,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:35:09,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:35:09,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:35:09,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:35:09,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:35:09,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:35:09,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:35:09,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:35:09,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:35:09,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:35:09,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:35:09,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:35:09,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:35:09,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:35:09,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:35:09,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:35:09,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:35:09,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:35:09,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:35:09,598 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 05:35:09,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:35:09,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:35:09,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:35:09,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:35:09,627 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:35:09,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:35:09,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:35:09,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:35:09,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:35:09,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:35:09,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:35:09,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:35:09,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:35:09,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:35:09,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:35:09,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:35:09,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:35:09,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:35:09,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:35:09,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:35:09,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:35:09,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:35:09,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:35:09,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:35:09,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:35:09,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:35:09,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:35:09,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:35:09,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:35:09,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:35:10,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:35:10,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:35:10,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:35:10,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:35:10,048 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:35:10,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:35:10,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcb39d1c1/d42b5c45729c4addbf7fb95821ab880e/FLAGf513430b6 [2020-10-27 05:35:10,953 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:35:10,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:35:10,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcb39d1c1/d42b5c45729c4addbf7fb95821ab880e/FLAGf513430b6 [2020-10-27 05:35:11,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcb39d1c1/d42b5c45729c4addbf7fb95821ab880e [2020-10-27 05:35:11,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:35:11,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:35:11,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:35:11,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:35:11,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:35:11,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:35:11" (1/1) ... [2020-10-27 05:35:11,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec3f403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:11, skipping insertion in model container [2020-10-27 05:35:11,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:35:11" (1/1) ... [2020-10-27 05:35:11,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:35:11,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:35:11,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:35:11,838 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:35:12,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:35:12,163 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:35:12,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12 WrapperNode [2020-10-27 05:35:12,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:35:12,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:35:12,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:35:12,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:35:12,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (1/1) ... [2020-10-27 05:35:12,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:35:12,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:35:12,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:35:12,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:35:12,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (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 05:35:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:35:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:35:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:35:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:35:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:35:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:35:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:35:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:35:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:35:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:35:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:35:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:35:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:35:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:35:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:35:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:35:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:35:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:35:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:35:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:35:14,444 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:35:14,444 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:35:14,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:35:14 BoogieIcfgContainer [2020-10-27 05:35:14,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:35:14,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:35:14,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:35:14,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:35:14,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:35:11" (1/3) ... [2020-10-27 05:35:14,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23378209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:35:14, skipping insertion in model container [2020-10-27 05:35:14,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:35:12" (2/3) ... [2020-10-27 05:35:14,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23378209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:35:14, skipping insertion in model container [2020-10-27 05:35:14,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:35:14" (3/3) ... [2020-10-27 05:35:14,455 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:35:14,467 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:35:14,472 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:35:14,485 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:35:14,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:35:14,515 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:35:14,516 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:35:14,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:35:14,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:35:14,516 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:35:14,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:35:14,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:35:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states. [2020-10-27 05:35:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:35:14,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:14,564 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 05:35:14,565 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:14,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1279329481, now seen corresponding path program 1 times [2020-10-27 05:35:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981080433] [2020-10-27 05:35:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:15,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:15,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:15,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:15,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:15,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:19,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:19,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:19,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:35:19,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:35:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:35:19,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:19,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:19,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:19,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:35:19,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:35:20,835 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:20,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:20,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:20,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:20,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 05:35:20,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:20,973 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 05:35:20,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981080433] [2020-10-27 05:35:20,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:20,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:20,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5511622] [2020-10-27 05:35:20,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:20,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:21,009 INFO L87 Difference]: Start difference. First operand 451 states. Second operand 8 states. [2020-10-27 05:35:21,794 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-27 05:35:26,056 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:35:27,437 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:35:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:27,629 INFO L93 Difference]: Finished difference Result 807 states and 1388 transitions. [2020-10-27 05:35:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:27,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 05:35:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:27,656 INFO L225 Difference]: With dead ends: 807 [2020-10-27 05:35:27,656 INFO L226 Difference]: Without dead ends: 671 [2020-10-27 05:35:27,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:35:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-10-27 05:35:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 448. [2020-10-27 05:35:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-27 05:35:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 580 transitions. [2020-10-27 05:35:27,805 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 580 transitions. Word has length 55 [2020-10-27 05:35:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:27,807 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 580 transitions. [2020-10-27 05:35:27,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 580 transitions. [2020-10-27 05:35:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:35:27,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:27,816 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 05:35:27,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:35:27,817 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash 142088305, now seen corresponding path program 1 times [2020-10-27 05:35:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115517781] [2020-10-27 05:35:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:27,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:27,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:28,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:28,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:29,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:30,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:31,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:32,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:35:32,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:35:32,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:35:32,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:35:32,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:33,849 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:33,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:33,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:33,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:33,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:33,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:33,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 05:35:33,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:33,948 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 05:35:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115517781] [2020-10-27 05:35:33,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:33,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480175742] [2020-10-27 05:35:33,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:33,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:33,952 INFO L87 Difference]: Start difference. First operand 448 states and 580 transitions. Second operand 8 states. [2020-10-27 05:35:34,667 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:35:37,826 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:35:39,505 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:35:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:39,746 INFO L93 Difference]: Finished difference Result 824 states and 1137 transitions. [2020-10-27 05:35:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:39,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 05:35:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:39,752 INFO L225 Difference]: With dead ends: 824 [2020-10-27 05:35:39,752 INFO L226 Difference]: Without dead ends: 738 [2020-10-27 05:35:39,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:35:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-27 05:35:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 471. [2020-10-27 05:35:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-27 05:35:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 612 transitions. [2020-10-27 05:35:39,786 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 612 transitions. Word has length 55 [2020-10-27 05:35:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:39,787 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 612 transitions. [2020-10-27 05:35:39,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 612 transitions. [2020-10-27 05:35:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:35:39,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:39,789 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 05:35:39,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:35:39,790 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:39,790 INFO L82 PathProgramCache]: Analyzing trace with hash -882442737, now seen corresponding path program 1 times [2020-10-27 05:35:39,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:39,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952987146] [2020-10-27 05:35:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:39,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:39,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:40,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:40,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:43,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:44,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:44,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:35:44,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:35:44,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:35:44,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:35:44,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:45,716 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:45,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:45,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:45,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:45,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 05:35:45,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:45,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:45,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:45,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:45,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:45,817 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 05:35:45,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952987146] [2020-10-27 05:35:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913079291] [2020-10-27 05:35:45,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:45,820 INFO L87 Difference]: Start difference. First operand 471 states and 612 transitions. Second operand 8 states. [2020-10-27 05:35:46,584 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:35:49,616 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:35:51,276 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:35:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:51,521 INFO L93 Difference]: Finished difference Result 825 states and 1128 transitions. [2020-10-27 05:35:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:51,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:35:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:51,527 INFO L225 Difference]: With dead ends: 825 [2020-10-27 05:35:51,527 INFO L226 Difference]: Without dead ends: 739 [2020-10-27 05:35:51,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:35:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-27 05:35:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 480. [2020-10-27 05:35:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-27 05:35:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 625 transitions. [2020-10-27 05:35:51,558 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 625 transitions. Word has length 56 [2020-10-27 05:35:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:51,558 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 625 transitions. [2020-10-27 05:35:51,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 625 transitions. [2020-10-27 05:35:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:35:51,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:51,560 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 05:35:51,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:35:51,561 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash 801416442, now seen corresponding path program 1 times [2020-10-27 05:35:51,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:51,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732902812] [2020-10-27 05:35:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:51,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:51,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:51,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:52,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:56,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:56,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:35:56,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:35:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:35:56,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:35:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:35:57,485 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:57,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:57,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:57,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:57,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:57,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:35:57,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:57,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:57,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:57,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:57,568 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 05:35:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732902812] [2020-10-27 05:35:57,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:57,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550214871] [2020-10-27 05:35:57,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:57,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:57,571 INFO L87 Difference]: Start difference. First operand 480 states and 625 transitions. Second operand 8 states. [2020-10-27 05:35:58,320 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:36:01,254 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:36:02,999 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:36:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:03,234 INFO L93 Difference]: Finished difference Result 977 states and 1346 transitions. [2020-10-27 05:36:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:36:03,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:36:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:03,243 INFO L225 Difference]: With dead ends: 977 [2020-10-27 05:36:03,243 INFO L226 Difference]: Without dead ends: 866 [2020-10-27 05:36:03,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:36:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-10-27 05:36:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 498. [2020-10-27 05:36:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-27 05:36:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 649 transitions. [2020-10-27 05:36:03,278 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 649 transitions. Word has length 56 [2020-10-27 05:36:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:03,279 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 649 transitions. [2020-10-27 05:36:03,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:36:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 649 transitions. [2020-10-27 05:36:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:36:03,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:03,281 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 05:36:03,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:36:03,281 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1832793895, now seen corresponding path program 1 times [2020-10-27 05:36:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:03,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001059002] [2020-10-27 05:36:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:03,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:03,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:03,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:03,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:04,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:05,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:05,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:06,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:06,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:08,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:08,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:36:08,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:36:08,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:36:08,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:08,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:36:08,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:36:08,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:09,260 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:09,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:09,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:09,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:09,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:09,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:09,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 05:36:09,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:09,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:09,379 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 05:36:09,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001059002] [2020-10-27 05:36:09,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:09,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:36:09,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235188153] [2020-10-27 05:36:09,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:36:09,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:36:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:36:09,393 INFO L87 Difference]: Start difference. First operand 498 states and 649 transitions. Second operand 11 states. [2020-10-27 05:36:11,051 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 329 DAG size of output: 325 [2020-10-27 05:36:15,752 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 327 DAG size of output: 323 [2020-10-27 05:36:16,693 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-27 05:36:19,385 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 319 DAG size of output: 316 [2020-10-27 05:36:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:19,657 INFO L93 Difference]: Finished difference Result 1022 states and 1398 transitions. [2020-10-27 05:36:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:36:19,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:36:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:19,663 INFO L225 Difference]: With dead ends: 1022 [2020-10-27 05:36:19,663 INFO L226 Difference]: Without dead ends: 938 [2020-10-27 05:36:19,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:36:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-10-27 05:36:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 516. [2020-10-27 05:36:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-27 05:36:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 676 transitions. [2020-10-27 05:36:19,703 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 676 transitions. Word has length 56 [2020-10-27 05:36:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:19,704 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 676 transitions. [2020-10-27 05:36:19,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:36:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 676 transitions. [2020-10-27 05:36:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:36:19,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:19,705 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 05:36:19,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:36:19,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash 825095460, now seen corresponding path program 1 times [2020-10-27 05:36:19,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:19,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568462744] [2020-10-27 05:36:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:19,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:19,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:20,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:36:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:24,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:36:24,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:25,650 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:25,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:25,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:25,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:25,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:25,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:36:25,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:25,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:25,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:25,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:25,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:25,742 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 05:36:25,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568462744] [2020-10-27 05:36:25,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:25,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:36:25,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583859395] [2020-10-27 05:36:25,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:36:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:36:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:36:25,746 INFO L87 Difference]: Start difference. First operand 516 states and 676 transitions. Second operand 8 states. [2020-10-27 05:36:26,480 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:36:29,404 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:36:30,780 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:36:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:30,961 INFO L93 Difference]: Finished difference Result 1012 states and 1391 transitions. [2020-10-27 05:36:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:36:30,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:36:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:30,968 INFO L225 Difference]: With dead ends: 1012 [2020-10-27 05:36:30,968 INFO L226 Difference]: Without dead ends: 894 [2020-10-27 05:36:30,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:36:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-27 05:36:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 527. [2020-10-27 05:36:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-27 05:36:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 690 transitions. [2020-10-27 05:36:31,015 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 690 transitions. Word has length 56 [2020-10-27 05:36:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:31,016 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 690 transitions. [2020-10-27 05:36:31,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:36:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 690 transitions. [2020-10-27 05:36:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:36:31,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:31,018 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 05:36:31,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:36:31,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1771708676, now seen corresponding path program 1 times [2020-10-27 05:36:31,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:31,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647598074] [2020-10-27 05:36:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:34,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:34,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:36:34,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3715 [2020-10-27 05:36:34,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:34,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:36:34,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:34,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:36:34,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:35,166 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-27 05:36:35,976 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:35,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:36,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:36,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:36,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:36,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:36:36,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:36,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:36,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:36,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:36,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:36,033 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 05:36:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647598074] [2020-10-27 05:36:36,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:36,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:36:36,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294366449] [2020-10-27 05:36:36,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:36:36,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:36:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:36:36,042 INFO L87 Difference]: Start difference. First operand 527 states and 690 transitions. Second operand 12 states. [2020-10-27 05:36:36,854 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-27 05:36:40,151 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-27 05:36:40,963 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:36:42,805 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-27 05:36:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:43,190 INFO L93 Difference]: Finished difference Result 1380 states and 1932 transitions. [2020-10-27 05:36:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:36:43,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-27 05:36:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:43,197 INFO L225 Difference]: With dead ends: 1380 [2020-10-27 05:36:43,197 INFO L226 Difference]: Without dead ends: 1048 [2020-10-27 05:36:43,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:36:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-10-27 05:36:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 632. [2020-10-27 05:36:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2020-10-27 05:36:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 859 transitions. [2020-10-27 05:36:43,274 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 859 transitions. Word has length 57 [2020-10-27 05:36:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:43,274 INFO L481 AbstractCegarLoop]: Abstraction has 632 states and 859 transitions. [2020-10-27 05:36:43,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:36:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 859 transitions. [2020-10-27 05:36:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:36:43,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:43,276 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, 1, 1, 1, 1] [2020-10-27 05:36:43,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:36:43,276 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash 100813814, now seen corresponding path program 1 times [2020-10-27 05:36:43,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:43,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916743879] [2020-10-27 05:36:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:43,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:47,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:47,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:36:47,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:47,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4362 [2020-10-27 05:36:47,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:47,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:36:47,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:36:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:48,403 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:48,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:48,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:48,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:48,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:48,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:36:48,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:48,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:48,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:48,443 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 05:36:48,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916743879] [2020-10-27 05:36:48,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:48,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:36:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869351539] [2020-10-27 05:36:48,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:36:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:36:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:36:48,446 INFO L87 Difference]: Start difference. First operand 632 states and 859 transitions. Second operand 8 states. [2020-10-27 05:36:49,265 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:36:51,651 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:36:53,137 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-27 05:36:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:53,572 INFO L93 Difference]: Finished difference Result 2384 states and 3493 transitions. [2020-10-27 05:36:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:36:53,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-27 05:36:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:53,584 INFO L225 Difference]: With dead ends: 2384 [2020-10-27 05:36:53,584 INFO L226 Difference]: Without dead ends: 2062 [2020-10-27 05:36:53,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:36:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-10-27 05:36:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 864. [2020-10-27 05:36:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-10-27 05:36:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1223 transitions. [2020-10-27 05:36:53,741 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1223 transitions. Word has length 58 [2020-10-27 05:36:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:53,741 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1223 transitions. [2020-10-27 05:36:53,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:36:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1223 transitions. [2020-10-27 05:36:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:36:53,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:53,743 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 05:36:53,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:36:53,743 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1752658208, now seen corresponding path program 1 times [2020-10-27 05:36:53,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:53,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560128112] [2020-10-27 05:36:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:53,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:54,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:54,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3867 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:36:57,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:58,825 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:58,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:58,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:58,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:58,872 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 05:36:58,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560128112] [2020-10-27 05:36:58,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:58,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:36:58,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852420775] [2020-10-27 05:36:58,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:36:58,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:58,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:36:58,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:36:58,874 INFO L87 Difference]: Start difference. First operand 864 states and 1223 transitions. Second operand 13 states. [2020-10-27 05:36:59,734 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2020-10-27 05:37:03,980 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2020-10-27 05:37:04,799 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:37:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:05,513 INFO L93 Difference]: Finished difference Result 2359 states and 3459 transitions. [2020-10-27 05:37:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:37:05,517 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-27 05:37:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:05,528 INFO L225 Difference]: With dead ends: 2359 [2020-10-27 05:37:05,528 INFO L226 Difference]: Without dead ends: 2354 [2020-10-27 05:37:05,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:37:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2020-10-27 05:37:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 861. [2020-10-27 05:37:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 861 states. [2020-10-27 05:37:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1219 transitions. [2020-10-27 05:37:05,676 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1219 transitions. Word has length 58 [2020-10-27 05:37:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:05,676 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1219 transitions. [2020-10-27 05:37:05,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:37:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1219 transitions. [2020-10-27 05:37:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:37:05,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:05,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:05,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:37:05,679 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:05,679 INFO L82 PathProgramCache]: Analyzing trace with hash -440068165, now seen corresponding path program 1 times [2020-10-27 05:37:05,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:05,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932921338] [2020-10-27 05:37:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:05,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:05,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:05,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:08,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:08,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:37:08,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:37:08,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2905 [2020-10-27 05:37:08,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:37:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:09,377 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:37:09,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:09,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:09,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:09,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:09,433 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 05:37:09,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932921338] [2020-10-27 05:37:09,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:09,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:37:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204755609] [2020-10-27 05:37:09,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:09,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:09,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:09,435 INFO L87 Difference]: Start difference. First operand 861 states and 1219 transitions. Second operand 6 states. [2020-10-27 05:37:10,196 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:37:12,259 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:37:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:12,461 INFO L93 Difference]: Finished difference Result 1809 states and 2644 transitions. [2020-10-27 05:37:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:12,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:37:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:12,466 INFO L225 Difference]: With dead ends: 1809 [2020-10-27 05:37:12,466 INFO L226 Difference]: Without dead ends: 1111 [2020-10-27 05:37:12,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-10-27 05:37:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1108. [2020-10-27 05:37:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2020-10-27 05:37:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1600 transitions. [2020-10-27 05:37:12,651 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1600 transitions. Word has length 71 [2020-10-27 05:37:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:12,651 INFO L481 AbstractCegarLoop]: Abstraction has 1108 states and 1600 transitions. [2020-10-27 05:37:12,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1600 transitions. [2020-10-27 05:37:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:37:12,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:12,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:12,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:37:12,654 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash 209402808, now seen corresponding path program 1 times [2020-10-27 05:37:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:12,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970403345] [2020-10-27 05:37:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:12,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:12,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:12,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:12,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:13,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4250 [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:37:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 05:37:16,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:17,664 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:37:17,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:17,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:17,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:17,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:17,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:37:17,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:37:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:37:17,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:17,706 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 05:37:17,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970403345] [2020-10-27 05:37:17,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:17,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:37:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656957836] [2020-10-27 05:37:17,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:17,708 INFO L87 Difference]: Start difference. First operand 1108 states and 1600 transitions. Second operand 6 states. [2020-10-27 05:37:20,320 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:37:21,034 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:37:21,798 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:37:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:22,238 INFO L93 Difference]: Finished difference Result 3529 states and 5243 transitions. [2020-10-27 05:37:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:37:22,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:37:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:22,249 INFO L225 Difference]: With dead ends: 3529 [2020-10-27 05:37:22,250 INFO L226 Difference]: Without dead ends: 2633 [2020-10-27 05:37:22,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2020-10-27 05:37:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2131. [2020-10-27 05:37:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2131 states. [2020-10-27 05:37:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 3118 transitions. [2020-10-27 05:37:22,646 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 3118 transitions. Word has length 71 [2020-10-27 05:37:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:22,647 INFO L481 AbstractCegarLoop]: Abstraction has 2131 states and 3118 transitions. [2020-10-27 05:37:22,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 3118 transitions. [2020-10-27 05:37:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:37:22,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:22,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:22,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:37:22,650 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1945591295, now seen corresponding path program 1 times [2020-10-27 05:37:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:22,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428351630] [2020-10-27 05:37:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:22,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:22,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:22,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:25,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3224 [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:25,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:37:25,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:26,616 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:37:26,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:26,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:26,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:26,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:26,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:26,687 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 05:37:26,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428351630] [2020-10-27 05:37:26,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:26,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:37:26,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14913331] [2020-10-27 05:37:26,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:26,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:26,690 INFO L87 Difference]: Start difference. First operand 2131 states and 3118 transitions. Second operand 6 states. [2020-10-27 05:37:27,497 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:37:29,557 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-27 05:37:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:30,004 INFO L93 Difference]: Finished difference Result 5004 states and 7450 transitions. [2020-10-27 05:37:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:30,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:37:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:30,019 INFO L225 Difference]: With dead ends: 5004 [2020-10-27 05:37:30,019 INFO L226 Difference]: Without dead ends: 3132 [2020-10-27 05:37:30,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2020-10-27 05:37:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3129. [2020-10-27 05:37:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2020-10-27 05:37:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4628 transitions. [2020-10-27 05:37:30,751 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4628 transitions. Word has length 71 [2020-10-27 05:37:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:30,751 INFO L481 AbstractCegarLoop]: Abstraction has 3129 states and 4628 transitions. [2020-10-27 05:37:30,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4628 transitions. [2020-10-27 05:37:30,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:37:30,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:30,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:30,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:37:30,755 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1035221759, now seen corresponding path program 1 times [2020-10-27 05:37:30,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:30,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084590156] [2020-10-27 05:37:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:31,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:35,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:35,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:37:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:36,603 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:37:36,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:36,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:36,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:36,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:36,654 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 05:37:36,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084590156] [2020-10-27 05:37:36,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:36,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:37:36,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131641620] [2020-10-27 05:37:36,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:37:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:37:36,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:36,656 INFO L87 Difference]: Start difference. First operand 3129 states and 4628 transitions. Second operand 9 states. [2020-10-27 05:37:37,485 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-27 05:37:40,462 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:37:41,223 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:37:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:41,930 INFO L93 Difference]: Finished difference Result 5331 states and 7838 transitions. [2020-10-27 05:37:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:37:41,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-27 05:37:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:41,945 INFO L225 Difference]: With dead ends: 5331 [2020-10-27 05:37:41,946 INFO L226 Difference]: Without dead ends: 4669 [2020-10-27 05:37:41,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:37:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2020-10-27 05:37:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 3129. [2020-10-27 05:37:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2020-10-27 05:37:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4625 transitions. [2020-10-27 05:37:42,667 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4625 transitions. Word has length 72 [2020-10-27 05:37:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:42,668 INFO L481 AbstractCegarLoop]: Abstraction has 3129 states and 4625 transitions. [2020-10-27 05:37:42,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:37:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4625 transitions. [2020-10-27 05:37:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:37:42,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:42,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:42,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:37:42,672 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1711877742, now seen corresponding path program 1 times [2020-10-27 05:37:42,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:42,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981380583] [2020-10-27 05:37:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:46,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:46,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4276 [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:37:46,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:47,788 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:37:47,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:47,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:47,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:47,853 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 05:37:47,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981380583] [2020-10-27 05:37:47,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:47,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:37:47,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067815353] [2020-10-27 05:37:47,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:37:47,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:37:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:47,856 INFO L87 Difference]: Start difference. First operand 3129 states and 4625 transitions. Second operand 10 states. [2020-10-27 05:37:48,695 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:37:51,717 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:37:52,493 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-27 05:37:53,537 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:37:55,211 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-27 05:37:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:56,047 INFO L93 Difference]: Finished difference Result 12090 states and 18149 transitions. [2020-10-27 05:37:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:37:56,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-27 05:37:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:56,092 INFO L225 Difference]: With dead ends: 12090 [2020-10-27 05:37:56,092 INFO L226 Difference]: Without dead ends: 11098 [2020-10-27 05:37:56,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:37:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11098 states. [2020-10-27 05:37:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11098 to 3162. [2020-10-27 05:37:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2020-10-27 05:37:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4660 transitions. [2020-10-27 05:37:56,705 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4660 transitions. Word has length 72 [2020-10-27 05:37:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:56,706 INFO L481 AbstractCegarLoop]: Abstraction has 3162 states and 4660 transitions. [2020-10-27 05:37:56,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:37:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4660 transitions. [2020-10-27 05:37:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:37:56,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:56,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:56,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:37:56,709 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:56,710 INFO L82 PathProgramCache]: Analyzing trace with hash -831255591, now seen corresponding path program 1 times [2020-10-27 05:37:56,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:56,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902034336] [2020-10-27 05:37:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:57,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:58,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:58,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:01,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:01,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:38:01,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:38:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:38:01,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:38:01,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:02,485 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:38:02,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:02,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:02,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:02,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:02,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:38:02,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:02,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:02,545 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 05:38:02,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902034336] [2020-10-27 05:38:02,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:02,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:38:02,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374970526] [2020-10-27 05:38:02,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:02,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:02,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:02,547 INFO L87 Difference]: Start difference. First operand 3162 states and 4660 transitions. Second operand 6 states. [2020-10-27 05:38:03,332 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:38:05,593 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:38:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:06,379 INFO L93 Difference]: Finished difference Result 8776 states and 13127 transitions. [2020-10-27 05:38:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:38:06,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 05:38:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:06,389 INFO L225 Difference]: With dead ends: 8776 [2020-10-27 05:38:06,389 INFO L226 Difference]: Without dead ends: 5956 [2020-10-27 05:38:06,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2020-10-27 05:38:07,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 5953. [2020-10-27 05:38:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5953 states. [2020-10-27 05:38:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 8835 transitions. [2020-10-27 05:38:07,417 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 8835 transitions. Word has length 72 [2020-10-27 05:38:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:07,417 INFO L481 AbstractCegarLoop]: Abstraction has 5953 states and 8835 transitions. [2020-10-27 05:38:07,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 8835 transitions. [2020-10-27 05:38:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:38:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:07,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:07,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:38:07,424 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2074887889, now seen corresponding path program 1 times [2020-10-27 05:38:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:07,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826798042] [2020-10-27 05:38:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:07,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:07,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:07,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:07,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:08,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:38:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:09,099 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:38:09,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:09,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:09,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:09,138 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 05:38:09,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826798042] [2020-10-27 05:38:09,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:09,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:38:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680525839] [2020-10-27 05:38:09,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:09,140 INFO L87 Difference]: Start difference. First operand 5953 states and 8835 transitions. Second operand 6 states. [2020-10-27 05:38:09,914 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:38:12,343 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-27 05:38:13,121 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-27 05:38:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:14,925 INFO L93 Difference]: Finished difference Result 20255 states and 30438 transitions. [2020-10-27 05:38:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:38:14,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:38:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:14,966 INFO L225 Difference]: With dead ends: 20255 [2020-10-27 05:38:14,967 INFO L226 Difference]: Without dead ends: 15232 [2020-10-27 05:38:14,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15232 states. [2020-10-27 05:38:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15232 to 11173. [2020-10-27 05:38:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11173 states. [2020-10-27 05:38:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11173 states to 11173 states and 16487 transitions. [2020-10-27 05:38:17,081 INFO L78 Accepts]: Start accepts. Automaton has 11173 states and 16487 transitions. Word has length 73 [2020-10-27 05:38:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:17,081 INFO L481 AbstractCegarLoop]: Abstraction has 11173 states and 16487 transitions. [2020-10-27 05:38:17,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 11173 states and 16487 transitions. [2020-10-27 05:38:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:38:17,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:17,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:17,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:38:17,090 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:17,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1311593322, now seen corresponding path program 1 times [2020-10-27 05:38:17,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:17,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530917357] [2020-10-27 05:38:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:17,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:17,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:38:17,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:18,478 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:38:18,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:18,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:18,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:18,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:18,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:38:18,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:18,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:18,527 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 05:38:18,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530917357] [2020-10-27 05:38:18,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:18,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:38:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992521773] [2020-10-27 05:38:18,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:38:18,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:38:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:38:18,530 INFO L87 Difference]: Start difference. First operand 11173 states and 16487 transitions. Second operand 4 states. [2020-10-27 05:38:19,338 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-27 05:38:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:24,015 INFO L93 Difference]: Finished difference Result 29535 states and 43593 transitions. [2020-10-27 05:38:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:38:24,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-27 05:38:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:24,049 INFO L225 Difference]: With dead ends: 29535 [2020-10-27 05:38:24,049 INFO L226 Difference]: Without dead ends: 19492 [2020-10-27 05:38:24,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:38:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19492 states. [2020-10-27 05:38:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19492 to 18225. [2020-10-27 05:38:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18225 states. [2020-10-27 05:38:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18225 states to 18225 states and 26677 transitions. [2020-10-27 05:38:27,716 INFO L78 Accepts]: Start accepts. Automaton has 18225 states and 26677 transitions. Word has length 74 [2020-10-27 05:38:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:27,716 INFO L481 AbstractCegarLoop]: Abstraction has 18225 states and 26677 transitions. [2020-10-27 05:38:27,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:38:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 18225 states and 26677 transitions. [2020-10-27 05:38:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:38:27,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:27,720 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] [2020-10-27 05:38:27,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:38:27,721 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash -602541307, now seen corresponding path program 1 times [2020-10-27 05:38:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:27,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848876954] [2020-10-27 05:38:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:27,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:28,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 05:38:28,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:28,835 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:38:28,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:28,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:28,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:28,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:28,873 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 05:38:28,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848876954] [2020-10-27 05:38:28,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:28,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:38:28,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112991181] [2020-10-27 05:38:28,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:38:28,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:28,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:38:28,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:38:28,875 INFO L87 Difference]: Start difference. First operand 18225 states and 26677 transitions. Second operand 4 states. [2020-10-27 05:38:29,627 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-27 05:38:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:36,779 INFO L93 Difference]: Finished difference Result 47869 states and 70047 transitions. [2020-10-27 05:38:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:38:36,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-27 05:38:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:36,824 INFO L225 Difference]: With dead ends: 47869 [2020-10-27 05:38:36,824 INFO L226 Difference]: Without dead ends: 30774 [2020-10-27 05:38:36,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:38:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30774 states. [2020-10-27 05:38:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30774 to 28995. [2020-10-27 05:38:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28995 states. [2020-10-27 05:38:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28995 states to 28995 states and 41965 transitions. [2020-10-27 05:38:42,695 INFO L78 Accepts]: Start accepts. Automaton has 28995 states and 41965 transitions. Word has length 75 [2020-10-27 05:38:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:42,695 INFO L481 AbstractCegarLoop]: Abstraction has 28995 states and 41965 transitions. [2020-10-27 05:38:42,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:38:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28995 states and 41965 transitions. [2020-10-27 05:38:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:38:42,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:42,699 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] [2020-10-27 05:38:42,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:38:42,699 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:42,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:42,699 INFO L82 PathProgramCache]: Analyzing trace with hash -924206240, now seen corresponding path program 1 times [2020-10-27 05:38:42,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:42,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624426964] [2020-10-27 05:38:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:42,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:42,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:42,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:43,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2261 [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:38:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:44,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:38:44,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:45,799 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:38:45,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:45,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:45,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:45,856 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 05:38:45,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624426964] [2020-10-27 05:38:45,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:45,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:38:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378998200] [2020-10-27 05:38:45,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:38:45,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:38:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:38:45,858 INFO L87 Difference]: Start difference. First operand 28995 states and 41965 transitions. Second operand 10 states. [2020-10-27 05:38:46,695 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-10-27 05:38:50,033 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:38:50,783 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 314