/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.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:15:55,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:15:55,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:15:55,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:15:55,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:15:55,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:15:55,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:15:55,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:15:55,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:15:55,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:15:55,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:15:55,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:15:55,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:15:55,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:15:55,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:15:55,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:15:55,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:15:55,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:15:55,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:15:55,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:15:55,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:15:55,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:15:55,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:15:55,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:15:55,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:15:55,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:15:55,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:15:55,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:15:55,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:15:55,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:15:55,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:15:55,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:15:55,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:15:55,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:15:55,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:15:55,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:15:55,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:15:55,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:15:55,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:15:55,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:15:55,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:15:55,629 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 05:15:55,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:15:55,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:15:55,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:15:55,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:15:55,658 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:15:55,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:15:55,658 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:15:55,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:15:55,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:15:55,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:15:55,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:15:55,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:15:55,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:15:55,660 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:15:55,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:15:55,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:15:55,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:15:55,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:15:55,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:15:55,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:15:55,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:15:55,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:15:55,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:15:55,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:15:55,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:15:55,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:15:55,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:15:55,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:15:55,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:15:55,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:15:56,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:15:56,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:15:56,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:15:56,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:15:56,108 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:15:56,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-27 05:15:56,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db0bfd08a/2df2bc188690468f8b92b1375bb0eb75/FLAGb60b1662a [2020-10-27 05:15:56,969 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:15:56,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-27 05:15:56,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db0bfd08a/2df2bc188690468f8b92b1375bb0eb75/FLAGb60b1662a [2020-10-27 05:15:57,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db0bfd08a/2df2bc188690468f8b92b1375bb0eb75 [2020-10-27 05:15:57,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:15:57,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:15:57,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:15:57,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:15:57,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:15:57,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:15:57" (1/1) ... [2020-10-27 05:15:57,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1892f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:57, skipping insertion in model container [2020-10-27 05:15:57,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:15:57" (1/1) ... [2020-10-27 05:15:57,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:15:57,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:15:57,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:15:58,018 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:15:58,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:15:58,413 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:15:58,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58 WrapperNode [2020-10-27 05:15:58,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:15:58,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:15:58,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:15:58,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:15:58,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (1/1) ... [2020-10-27 05:15:58,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:15:58,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:15:58,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:15:58,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:15:58,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (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 05:15:58,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:15:58,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:15:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:15:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:15:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:15:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:15:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:15:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:15:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:15:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:15:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:15:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:15:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:15:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:15:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:15:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:15:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:15:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:15:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:15:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:15:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:16:01,190 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:16:01,191 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:16:01,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:16:01 BoogieIcfgContainer [2020-10-27 05:16:01,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:16:01,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:16:01,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:16:01,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:16:01,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:15:57" (1/3) ... [2020-10-27 05:16:01,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50429f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:16:01, skipping insertion in model container [2020-10-27 05:16:01,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:15:58" (2/3) ... [2020-10-27 05:16:01,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50429f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:16:01, skipping insertion in model container [2020-10-27 05:16:01,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:16:01" (3/3) ... [2020-10-27 05:16:01,202 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-27 05:16:01,214 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:16:01,219 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:16:01,232 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:16:01,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:16:01,262 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:16:01,262 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:16:01,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:16:01,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:16:01,263 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:16:01,263 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:16:01,263 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:16:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states. [2020-10-27 05:16:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:16:01,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:01,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:16:01,314 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash 445602210, now seen corresponding path program 1 times [2020-10-27 05:16:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:01,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536107134] [2020-10-27 05:16:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:01,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:02,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:03,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:03,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:05,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:05,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:06,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:06,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:16:06,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:16:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:16:06,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:16:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:16:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:16:08,700 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:16:08,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:08,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:08,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:08,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:08,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 05:16:08,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:08,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:08,818 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 05:16:08,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536107134] [2020-10-27 05:16:08,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:08,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:16:08,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003621421] [2020-10-27 05:16:08,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:16:08,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:16:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:16:08,844 INFO L87 Difference]: Start difference. First operand 579 states. Second operand 6 states. [2020-10-27 05:16:09,774 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:16:13,431 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:16:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:13,866 INFO L93 Difference]: Finished difference Result 808 states and 1379 transitions. [2020-10-27 05:16:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:16:13,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 05:16:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:13,901 INFO L225 Difference]: With dead ends: 808 [2020-10-27 05:16:13,901 INFO L226 Difference]: Without dead ends: 502 [2020-10-27 05:16:13,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:16:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-27 05:16:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 461. [2020-10-27 05:16:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-27 05:16:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 598 transitions. [2020-10-27 05:16:14,051 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 598 transitions. Word has length 65 [2020-10-27 05:16:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:14,052 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 598 transitions. [2020-10-27 05:16:14,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:16:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 598 transitions. [2020-10-27 05:16:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:16:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:14,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:16:14,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:16:14,057 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1509097892, now seen corresponding path program 1 times [2020-10-27 05:16:14,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:14,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880760345] [2020-10-27 05:16:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:14,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:14,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:14,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:17,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:18,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:19,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:19,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:16:19,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:16:19,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 05:16:19,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:16:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:16:19,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:20,255 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:16:20,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:20,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:20,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:20,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:20,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 05:16:20,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:20,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:20,372 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 05:16:20,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880760345] [2020-10-27 05:16:20,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:20,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:16:20,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130248948] [2020-10-27 05:16:20,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:16:20,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:16:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:16:20,376 INFO L87 Difference]: Start difference. First operand 461 states and 598 transitions. Second operand 15 states. [2020-10-27 05:16:21,506 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-27 05:16:25,116 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-27 05:16:26,151 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:16:27,199 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:16:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:27,897 INFO L93 Difference]: Finished difference Result 1009 states and 1347 transitions. [2020-10-27 05:16:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:16:27,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-27 05:16:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:27,905 INFO L225 Difference]: With dead ends: 1009 [2020-10-27 05:16:27,905 INFO L226 Difference]: Without dead ends: 749 [2020-10-27 05:16:27,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 05:16:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-10-27 05:16:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 587. [2020-10-27 05:16:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-27 05:16:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 802 transitions. [2020-10-27 05:16:27,994 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 802 transitions. Word has length 65 [2020-10-27 05:16:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:27,996 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 802 transitions. [2020-10-27 05:16:27,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:16:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 802 transitions. [2020-10-27 05:16:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:16:28,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:28,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:16:28,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:16:28,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash -426155862, now seen corresponding path program 1 times [2020-10-27 05:16:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:28,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811723771] [2020-10-27 05:16:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:29,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:33,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:33,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:16:33,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:16:33,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:16:33,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:16:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:16:33,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:33,914 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:16:33,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:33,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:33,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:33,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:33,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:16:33,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:33,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:33,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:33,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:33,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:34,017 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 05:16:34,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811723771] [2020-10-27 05:16:34,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:34,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:16:34,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509672358] [2020-10-27 05:16:34,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:16:34,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:34,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:16:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:16:34,021 INFO L87 Difference]: Start difference. First operand 587 states and 802 transitions. Second operand 6 states. [2020-10-27 05:16:34,927 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:16:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:36,460 INFO L93 Difference]: Finished difference Result 902 states and 1262 transitions. [2020-10-27 05:16:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:16:36,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 05:16:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:36,466 INFO L225 Difference]: With dead ends: 902 [2020-10-27 05:16:36,466 INFO L226 Difference]: Without dead ends: 550 [2020-10-27 05:16:36,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:16:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-27 05:16:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2020-10-27 05:16:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-27 05:16:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 756 transitions. [2020-10-27 05:16:36,507 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 756 transitions. Word has length 67 [2020-10-27 05:16:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:36,508 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 756 transitions. [2020-10-27 05:16:36,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:16:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 756 transitions. [2020-10-27 05:16:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:16:36,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:36,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:16:36,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:16:36,510 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1523114391, now seen corresponding path program 1 times [2020-10-27 05:16:36,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:36,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834965350] [2020-10-27 05:16:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:36,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:36,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:38,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:38,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:40,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:40,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:41,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:41,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:16:41,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:16:41,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:16:41,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:16:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:16:41,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:42,515 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:16:42,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:42,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:42,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:42,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:16:42,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:42,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:42,631 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 05:16:42,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834965350] [2020-10-27 05:16:42,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:42,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:16:42,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036152112] [2020-10-27 05:16:42,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:16:42,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:16:42,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:16:42,635 INFO L87 Difference]: Start difference. First operand 550 states and 756 transitions. Second operand 10 states. [2020-10-27 05:16:43,707 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-27 05:16:45,913 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:16:46,906 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 05:16:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:47,748 INFO L93 Difference]: Finished difference Result 1022 states and 1449 transitions. [2020-10-27 05:16:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:16:47,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 05:16:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:47,758 INFO L225 Difference]: With dead ends: 1022 [2020-10-27 05:16:47,758 INFO L226 Difference]: Without dead ends: 1015 [2020-10-27 05:16:47,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:16:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-10-27 05:16:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 550. [2020-10-27 05:16:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-27 05:16:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 755 transitions. [2020-10-27 05:16:47,811 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 755 transitions. Word has length 67 [2020-10-27 05:16:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:47,811 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 755 transitions. [2020-10-27 05:16:47,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:16:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 755 transitions. [2020-10-27 05:16:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:16:47,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:47,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:16:47,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:16:47,813 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1270044957, now seen corresponding path program 1 times [2020-10-27 05:16:47,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:47,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575990479] [2020-10-27 05:16:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:48,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:48,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:49,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:52,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:52,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:16:52,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:16:52,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:16:52,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:16:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:16:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:54,036 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:16:54,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:54,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:54,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:54,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:54,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:54,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:16:54,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:54,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:54,134 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 05:16:54,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575990479] [2020-10-27 05:16:54,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:54,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:16:54,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636135728] [2020-10-27 05:16:54,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:16:54,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:16:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:16:54,137 INFO L87 Difference]: Start difference. First operand 550 states and 755 transitions. Second operand 14 states. [2020-10-27 05:16:55,256 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2020-10-27 05:16:58,436 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-27 05:16:59,552 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 05:17:00,500 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-27 05:17:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:01,445 INFO L93 Difference]: Finished difference Result 1123 states and 1571 transitions. [2020-10-27 05:17:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:17:01,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-27 05:17:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:01,452 INFO L225 Difference]: With dead ends: 1123 [2020-10-27 05:17:01,452 INFO L226 Difference]: Without dead ends: 1104 [2020-10-27 05:17:01,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:17:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-10-27 05:17:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 550. [2020-10-27 05:17:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-27 05:17:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 754 transitions. [2020-10-27 05:17:01,515 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 754 transitions. Word has length 67 [2020-10-27 05:17:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:01,516 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 754 transitions. [2020-10-27 05:17:01,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:17:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 754 transitions. [2020-10-27 05:17:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:17:01,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:01,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:01,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:17:01,519 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash 195358437, now seen corresponding path program 1 times [2020-10-27 05:17:01,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188913337] [2020-10-27 05:17:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:01,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:01,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:03,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:03,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:04,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:06,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:17:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:07,428 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:17:07,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:07,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:07,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:07,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:07,501 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 05:17:07,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188913337] [2020-10-27 05:17:07,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:07,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930136219] [2020-10-27 05:17:07,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:07,503 INFO L87 Difference]: Start difference. First operand 550 states and 754 transitions. Second operand 6 states. [2020-10-27 05:17:08,409 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:17:10,491 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 05:17:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:10,956 INFO L93 Difference]: Finished difference Result 1153 states and 1592 transitions. [2020-10-27 05:17:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:17:10,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:17:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:10,965 INFO L225 Difference]: With dead ends: 1153 [2020-10-27 05:17:10,965 INFO L226 Difference]: Without dead ends: 808 [2020-10-27 05:17:10,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-10-27 05:17:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 768. [2020-10-27 05:17:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-27 05:17:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1065 transitions. [2020-10-27 05:17:11,054 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1065 transitions. Word has length 68 [2020-10-27 05:17:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:11,056 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1065 transitions. [2020-10-27 05:17:11,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1065 transitions. [2020-10-27 05:17:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:17:11,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:11,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:11,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:17:11,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2128380600, now seen corresponding path program 1 times [2020-10-27 05:17:11,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:11,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700559552] [2020-10-27 05:17:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:11,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:13,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:15,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:16,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:17:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:17,072 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:17:17,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:17,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:17,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:17,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:17,148 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 05:17:17,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700559552] [2020-10-27 05:17:17,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:17,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:17:17,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429005341] [2020-10-27 05:17:17,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:17:17,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:17,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:17:17,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:17:17,150 INFO L87 Difference]: Start difference. First operand 768 states and 1065 transitions. Second operand 12 states. [2020-10-27 05:17:19,096 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2020-10-27 05:17:22,765 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 360 DAG size of output: 359 [2020-10-27 05:17:23,857 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-27 05:17:27,128 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 355 DAG size of output: 354 [2020-10-27 05:17:28,029 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:17:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:28,392 INFO L93 Difference]: Finished difference Result 3707 states and 5421 transitions. [2020-10-27 05:17:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:17:28,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-27 05:17:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:28,408 INFO L225 Difference]: With dead ends: 3707 [2020-10-27 05:17:28,408 INFO L226 Difference]: Without dead ends: 3287 [2020-10-27 05:17:28,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:17:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2020-10-27 05:17:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 768. [2020-10-27 05:17:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-27 05:17:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1063 transitions. [2020-10-27 05:17:28,554 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1063 transitions. Word has length 69 [2020-10-27 05:17:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:28,554 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1063 transitions. [2020-10-27 05:17:28,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:17:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1063 transitions. [2020-10-27 05:17:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:17:28,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:28,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:28,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:17:28,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash -676320192, now seen corresponding path program 1 times [2020-10-27 05:17:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:28,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406912302] [2020-10-27 05:17:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:28,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:30,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:31,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:31,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:32,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:17:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:34,769 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:17:34,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:34,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:34,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:34,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:34,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:34,885 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 05:17:34,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406912302] [2020-10-27 05:17:34,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:34,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:17:34,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765113860] [2020-10-27 05:17:34,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:17:34,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:34,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:17:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:17:34,897 INFO L87 Difference]: Start difference. First operand 768 states and 1063 transitions. Second operand 17 states. [2020-10-27 05:17:35,076 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:17:35,258 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 05:17:37,325 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 376 DAG size of output: 374 [2020-10-27 05:17:41,232 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-27 05:17:42,338 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:17:43,204 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:17:44,155 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:17:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:45,566 INFO L93 Difference]: Finished difference Result 1988 states and 2806 transitions. [2020-10-27 05:17:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:17:45,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-27 05:17:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:45,575 INFO L225 Difference]: With dead ends: 1988 [2020-10-27 05:17:45,575 INFO L226 Difference]: Without dead ends: 1562 [2020-10-27 05:17:45,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:17:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2020-10-27 05:17:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 780. [2020-10-27 05:17:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 05:17:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1079 transitions. [2020-10-27 05:17:45,696 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1079 transitions. Word has length 69 [2020-10-27 05:17:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:45,696 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1079 transitions. [2020-10-27 05:17:45,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:17:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1079 transitions. [2020-10-27 05:17:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:17:45,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:45,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:45,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:17:45,698 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1526535780, now seen corresponding path program 1 times [2020-10-27 05:17:45,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:45,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545428165] [2020-10-27 05:17:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:45,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:48,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:50,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:17:50,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:51,894 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:17:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:51,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:51,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:51,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:51,972 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 05:17:51,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545428165] [2020-10-27 05:17:51,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:51,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:17:51,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818462393] [2020-10-27 05:17:51,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:17:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:17:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:17:51,975 INFO L87 Difference]: Start difference. First operand 780 states and 1079 transitions. Second operand 15 states. [2020-10-27 05:17:54,040 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2020-10-27 05:17:56,983 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 05:17:57,960 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 05:17:58,876 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:18:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:01,568 INFO L93 Difference]: Finished difference Result 3433 states and 4920 transitions. [2020-10-27 05:18:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 05:18:01,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-27 05:18:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:01,581 INFO L225 Difference]: With dead ends: 3433 [2020-10-27 05:18:01,581 INFO L226 Difference]: Without dead ends: 3009 [2020-10-27 05:18:01,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=500, Invalid=2152, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 05:18:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2020-10-27 05:18:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 780. [2020-10-27 05:18:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 05:18:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1078 transitions. [2020-10-27 05:18:01,744 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1078 transitions. Word has length 69 [2020-10-27 05:18:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:01,744 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1078 transitions. [2020-10-27 05:18:01,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:18:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1078 transitions. [2020-10-27 05:18:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:18:01,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:01,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:01,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:18:01,746 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash 646695385, now seen corresponding path program 1 times [2020-10-27 05:18:01,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:01,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629064507] [2020-10-27 05:18:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:01,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:02,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:02,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:03,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:06,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:06,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:18:06,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:18:06,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:18:06,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:06,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:18:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:18:06,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:07,702 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:18:07,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:07,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:07,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:07,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:07,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:18:07,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:07,762 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 05:18:07,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629064507] [2020-10-27 05:18:07,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:07,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:18:07,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314641827] [2020-10-27 05:18:07,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:18:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:18:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:18:07,764 INFO L87 Difference]: Start difference. First operand 780 states and 1078 transitions. Second operand 9 states. [2020-10-27 05:18:08,727 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-27 05:18:10,823 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:18:11,774 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 05:18:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:12,409 INFO L93 Difference]: Finished difference Result 1608 states and 2258 transitions. [2020-10-27 05:18:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:18:12,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-27 05:18:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:12,413 INFO L225 Difference]: With dead ends: 1608 [2020-10-27 05:18:12,413 INFO L226 Difference]: Without dead ends: 1026 [2020-10-27 05:18:12,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:18:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-10-27 05:18:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 780. [2020-10-27 05:18:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 05:18:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1077 transitions. [2020-10-27 05:18:12,558 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1077 transitions. Word has length 69 [2020-10-27 05:18:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:12,559 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1077 transitions. [2020-10-27 05:18:12,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:18:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1077 transitions. [2020-10-27 05:18:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:18:12,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:12,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:12,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:18:12,561 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -953028404, now seen corresponding path program 1 times [2020-10-27 05:18:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:12,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828532840] [2020-10-27 05:18:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:12,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:13,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:17,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:18:17,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 05:18:17,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 05:18:17,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:18:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:18:17,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:18,579 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:18:18,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:18,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:18,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:18,642 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 05:18:18,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828532840] [2020-10-27 05:18:18,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:18,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:18:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252576716] [2020-10-27 05:18:18,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:18:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:18:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:18:18,644 INFO L87 Difference]: Start difference. First operand 780 states and 1077 transitions. Second operand 10 states. [2020-10-27 05:18:19,615 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-27 05:18:22,127 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:18:23,078 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 05:18:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:24,230 INFO L93 Difference]: Finished difference Result 2648 states and 3831 transitions. [2020-10-27 05:18:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:18:24,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 05:18:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:24,237 INFO L225 Difference]: With dead ends: 2648 [2020-10-27 05:18:24,237 INFO L226 Difference]: Without dead ends: 2201 [2020-10-27 05:18:24,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:18:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2020-10-27 05:18:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 768. [2020-10-27 05:18:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-27 05:18:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1060 transitions. [2020-10-27 05:18:24,385 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1060 transitions. Word has length 70 [2020-10-27 05:18:24,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:24,385 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1060 transitions. [2020-10-27 05:18:24,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:18:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1060 transitions. [2020-10-27 05:18:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:18:24,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:24,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:24,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:18:24,387 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -30631892, now seen corresponding path program 1 times [2020-10-27 05:18:24,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:24,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816381897] [2020-10-27 05:18:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:24,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:29,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:29,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:29,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:29,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:18:29,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:18:29,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:18:29,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:29,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:18:29,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:29,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:18:29,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:30,348 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:18:30,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:30,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:30,435 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 05:18:30,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816381897] [2020-10-27 05:18:30,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:30,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:18:30,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743749743] [2020-10-27 05:18:30,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:18:30,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:18:30,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:18:30,437 INFO L87 Difference]: Start difference. First operand 768 states and 1060 transitions. Second operand 10 states. [2020-10-27 05:18:31,422 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-27 05:18:33,858 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:18:34,721 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 05:18:36,800 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:18:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:37,303 INFO L93 Difference]: Finished difference Result 2873 states and 4225 transitions. [2020-10-27 05:18:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:18:37,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 05:18:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:37,312 INFO L225 Difference]: With dead ends: 2873 [2020-10-27 05:18:37,312 INFO L226 Difference]: Without dead ends: 2459 [2020-10-27 05:18:37,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:18:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2020-10-27 05:18:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 768. [2020-10-27 05:18:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-27 05:18:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1059 transitions. [2020-10-27 05:18:37,462 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1059 transitions. Word has length 70 [2020-10-27 05:18:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:37,463 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1059 transitions. [2020-10-27 05:18:37,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:18:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1059 transitions. [2020-10-27 05:18:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:18:37,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:37,464 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 05:18:37,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:18:37,465 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash 989758452, now seen corresponding path program 1 times [2020-10-27 05:18:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:37,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515501613] [2020-10-27 05:18:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:37,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:40,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:42,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:18:42,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:18:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:18:42,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:18:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:18:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:43,436 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:18:43,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:43,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:43,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:43,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:43,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:18:43,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:43,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:43,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:43,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:43,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:43,503 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 05:18:43,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515501613] [2020-10-27 05:18:43,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:43,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:18:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046232412] [2020-10-27 05:18:43,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:18:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:18:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:18:43,506 INFO L87 Difference]: Start difference. First operand 768 states and 1059 transitions. Second operand 11 states. [2020-10-27 05:18:44,474 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-27 05:18:47,272 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:18:48,309 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 05:18:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:51,061 INFO L93 Difference]: Finished difference Result 3588 states and 5187 transitions. [2020-10-27 05:18:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:18:51,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-27 05:18:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:51,072 INFO L225 Difference]: With dead ends: 3588 [2020-10-27 05:18:51,072 INFO L226 Difference]: Without dead ends: 3105 [2020-10-27 05:18:51,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:18:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2020-10-27 05:18:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 773. [2020-10-27 05:18:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2020-10-27 05:18:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1064 transitions. [2020-10-27 05:18:51,238 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1064 transitions. Word has length 71 [2020-10-27 05:18:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:51,238 INFO L481 AbstractCegarLoop]: Abstraction has 773 states and 1064 transitions. [2020-10-27 05:18:51,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:18:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1064 transitions. [2020-10-27 05:18:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:18:51,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:51,240 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 05:18:51,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:18:51,240 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:51,240 INFO L82 PathProgramCache]: Analyzing trace with hash -651607013, now seen corresponding path program 1 times [2020-10-27 05:18:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:51,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189314532] [2020-10-27 05:18:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:51,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:53,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:18:56,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:57,276 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:18:57,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:57,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:57,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:57,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:57,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:18:57,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:57,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:57,340 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 05:18:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189314532] [2020-10-27 05:18:57,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:57,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:18:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108164029] [2020-10-27 05:18:57,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:18:57,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:18:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:18:57,342 INFO L87 Difference]: Start difference. First operand 773 states and 1064 transitions. Second operand 12 states. [2020-10-27 05:18:59,348 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 359 DAG size of output: 358 [2020-10-27 05:19:03,424 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2020-10-27 05:19:04,487 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-27 05:19:08,943 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2020-10-27 05:19:09,864 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:19:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:10,125 INFO L93 Difference]: Finished difference Result 2875 states and 4186 transitions. [2020-10-27 05:19:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:19:10,125 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-27 05:19:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:10,134 INFO L225 Difference]: With dead ends: 2875 [2020-10-27 05:19:10,134 INFO L226 Difference]: Without dead ends: 2651 [2020-10-27 05:19:10,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:19:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2020-10-27 05:19:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 773. [2020-10-27 05:19:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2020-10-27 05:19:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1063 transitions. [2020-10-27 05:19:10,349 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1063 transitions. Word has length 71 [2020-10-27 05:19:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:10,350 INFO L481 AbstractCegarLoop]: Abstraction has 773 states and 1063 transitions. [2020-10-27 05:19:10,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:19:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1063 transitions. [2020-10-27 05:19:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:19:10,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:10,351 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 05:19:10,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:19:10,352 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1999541249, now seen corresponding path program 1 times [2020-10-27 05:19:10,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:10,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283988341] [2020-10-27 05:19:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:11,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:15,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:15,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:19:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:16,358 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:19:16,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:16,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:16,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:16,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:16,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:19:16,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:16,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:16,442 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 05:19:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283988341] [2020-10-27 05:19:16,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:16,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:19:16,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056045405] [2020-10-27 05:19:16,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:19:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:19:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:19:16,445 INFO L87 Difference]: Start difference. First operand 773 states and 1063 transitions. Second operand 10 states. [2020-10-27 05:19:17,413 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:19:19,832 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:19:20,701 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:19:23,325 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:19:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:23,728 INFO L93 Difference]: Finished difference Result 2471 states and 3609 transitions. [2020-10-27 05:19:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:19:23,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-27 05:19:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:23,739 INFO L225 Difference]: With dead ends: 2471 [2020-10-27 05:19:23,740 INFO L226 Difference]: Without dead ends: 2464 [2020-10-27 05:19:23,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:19:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2020-10-27 05:19:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 773. [2020-10-27 05:19:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2020-10-27 05:19:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1061 transitions. [2020-10-27 05:19:23,925 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1061 transitions. Word has length 71 [2020-10-27 05:19:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:23,925 INFO L481 AbstractCegarLoop]: Abstraction has 773 states and 1061 transitions. [2020-10-27 05:19:23,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:19:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1061 transitions. [2020-10-27 05:19:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:19:23,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:23,926 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 05:19:23,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:19:23,926 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:23,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1882489583, now seen corresponding path program 1 times [2020-10-27 05:19:23,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:23,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559399770] [2020-10-27 05:19:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:23,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:25,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:26,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:28,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:19:28,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:30,536 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:19:30,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:30,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:30,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:30,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:19:30,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:19:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:19:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:30,617 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 05:19:30,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559399770] [2020-10-27 05:19:30,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:30,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-27 05:19:30,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180278489] [2020-10-27 05:19:30,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 05:19:30,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 05:19:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:19:30,619 INFO L87 Difference]: Start difference. First operand 773 states and 1061 transitions. Second operand 19 states. [2020-10-27 05:19:30,926 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-27 05:19:33,221 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 406 DAG size of output: 399 [2020-10-27 05:19:33,769 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-27 05:19:34,021 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-27 05:19:38,079 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-27 05:19:39,107 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-27 05:19:40,173 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 355