/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:14:22,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:14:22,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:14:22,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:14:22,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:14:22,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:14:22,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:14:22,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:14:22,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:14:22,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:14:22,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:14:22,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:14:22,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:14:22,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:14:22,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:14:22,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:14:22,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:14:22,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:14:22,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:14:22,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:14:22,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:14:22,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:14:22,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:14:22,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:14:22,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:14:22,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:14:22,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:14:22,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:14:22,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:14:22,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:14:22,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:14:22,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:14:22,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:14:22,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:14:22,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:14:22,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:14:22,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:14:22,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:14:22,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:14:22,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:14:22,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:14:22,507 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 [2020-10-29 13:14:22,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:14:22,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:14:22,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:14:22,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:14:22,578 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:14:22,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:14:22,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:14:22,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:14:22,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:14:22,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:14:22,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:14:22,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:14:22,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:14:22,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:14:22,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:14:22,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:14:22,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:14:22,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:14:22,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:14:22,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:14:22,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:14:22,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:14:22,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:14:22,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:14:22,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:14:22,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:14:22,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:14:22,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:14:22,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:14:22,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:14:22,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:14:23,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:14:23,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:14:23,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:14:23,024 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:14:23,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-29 13:14:23,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c907fe285/aada6843e7164b9faa6ea1d0b8ab33d2/FLAGde0c10090 [2020-10-29 13:14:23,911 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:14:23,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-29 13:14:23,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c907fe285/aada6843e7164b9faa6ea1d0b8ab33d2/FLAGde0c10090 [2020-10-29 13:14:24,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c907fe285/aada6843e7164b9faa6ea1d0b8ab33d2 [2020-10-29 13:14:24,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:14:24,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:14:24,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:14:24,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:14:24,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:14:24,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:24,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec3f403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24, skipping insertion in model container [2020-10-29 13:14:24,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:24,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:14:24,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:14:24,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:14:24,661 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:14:24,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:14:24,874 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:14:24,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24 WrapperNode [2020-10-29 13:14:24,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:14:24,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:14:24,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:14:24,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:14:24,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:24,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:24,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:24,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:25,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:25,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:25,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (1/1) ... [2020-10-29 13:14:25,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:14:25,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:14:25,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:14:25,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:14:25,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (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 [2020-10-29 13:14:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:14:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:14:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:14:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:14:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:14:25,136 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:14:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:14:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:14:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:14:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:14:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:14:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:14:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:14:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:14:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:14:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:14:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:14:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:14:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:14:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:14:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:14:26,410 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:14:26,410 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:14:26,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:14:26 BoogieIcfgContainer [2020-10-29 13:14:26,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:14:26,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:14:26,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:14:26,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:14:26,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:14:24" (1/3) ... [2020-10-29 13:14:26,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e189156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:14:26, skipping insertion in model container [2020-10-29 13:14:26,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:24" (2/3) ... [2020-10-29 13:14:26,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e189156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:14:26, skipping insertion in model container [2020-10-29 13:14:26,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:14:26" (3/3) ... [2020-10-29 13:14:26,423 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-29 13:14:26,437 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:14:26,442 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:14:26,460 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:14:26,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:14:26,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:14:26,497 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:14:26,497 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:14:26,497 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:14:26,497 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:14:26,497 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:14:26,498 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:14:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2020-10-29 13:14:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:14:26,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:26,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:26,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash 288360738, now seen corresponding path program 1 times [2020-10-29 13:14:26,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:26,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766868674] [2020-10-29 13:14:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:30,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:30,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:30,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:31,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:32,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:14:32,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:14:32,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-29 13:14:32,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:32,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:32,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:32,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:14:32,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:14:32,522 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:14:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:32,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:32,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:32,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:32,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 13:14:32,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:32,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:32,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:32,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:32,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:32,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766868674] [2020-10-29 13:14:32,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:32,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:32,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789233641] [2020-10-29 13:14:32,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:32,679 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 6 states. [2020-10-29 13:14:33,242 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:14:34,787 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:14:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:35,056 INFO L93 Difference]: Finished difference Result 415 states and 702 transitions. [2020-10-29 13:14:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:14:35,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:14:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:35,072 INFO L225 Difference]: With dead ends: 415 [2020-10-29 13:14:35,072 INFO L226 Difference]: Without dead ends: 252 [2020-10-29 13:14:35,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-29 13:14:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 230. [2020-10-29 13:14:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-29 13:14:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 300 transitions. [2020-10-29 13:14:35,197 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 300 transitions. Word has length 52 [2020-10-29 13:14:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:35,198 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 300 transitions. [2020-10-29 13:14:35,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 300 transitions. [2020-10-29 13:14:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:14:35,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:35,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:35,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:14:35,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:35,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1747813128, now seen corresponding path program 1 times [2020-10-29 13:14:35,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:35,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733792348] [2020-10-29 13:14:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:40,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:14:40,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:14:40,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:14:40,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:40,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:40,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:40,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:14:40,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:14:40,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:40,672 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:14:40,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:40,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:40,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:40,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:40,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:14:40,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:40,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:40,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:40,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733792348] [2020-10-29 13:14:40,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695033043] [2020-10-29 13:14:40,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:40,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:40,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:40,731 INFO L87 Difference]: Start difference. First operand 230 states and 300 transitions. Second operand 6 states. [2020-10-29 13:14:41,078 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:14:42,362 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:14:42,782 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:14:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:43,750 INFO L93 Difference]: Finished difference Result 1101 states and 1573 transitions. [2020-10-29 13:14:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:43,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:14:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:43,766 INFO L225 Difference]: With dead ends: 1101 [2020-10-29 13:14:43,766 INFO L226 Difference]: Without dead ends: 1003 [2020-10-29 13:14:43,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-10-29 13:14:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 576. [2020-10-29 13:14:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-10-29 13:14:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 812 transitions. [2020-10-29 13:14:43,854 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 812 transitions. Word has length 53 [2020-10-29 13:14:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:43,855 INFO L481 AbstractCegarLoop]: Abstraction has 576 states and 812 transitions. [2020-10-29 13:14:43,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 812 transitions. [2020-10-29 13:14:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:14:43,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:43,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:43,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:14:43,861 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1656256971, now seen corresponding path program 1 times [2020-10-29 13:14:43,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:43,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192729752] [2020-10-29 13:14:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:48,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:14:48,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:14:48,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:14:48,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:48,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:14:48,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:49,450 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:14:49,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:49,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:49,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:49,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:14:49,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:49,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:49,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192729752] [2020-10-29 13:14:49,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:49,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:14:49,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138294076] [2020-10-29 13:14:49,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:49,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:49,506 INFO L87 Difference]: Start difference. First operand 576 states and 812 transitions. Second operand 8 states. [2020-10-29 13:14:49,844 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:14:50,634 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:14:51,030 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:14:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:51,360 INFO L93 Difference]: Finished difference Result 1074 states and 1578 transitions. [2020-10-29 13:14:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:14:51,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:14:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:51,365 INFO L225 Difference]: With dead ends: 1074 [2020-10-29 13:14:51,365 INFO L226 Difference]: Without dead ends: 686 [2020-10-29 13:14:51,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:14:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-10-29 13:14:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 513. [2020-10-29 13:14:51,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-29 13:14:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 719 transitions. [2020-10-29 13:14:51,418 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 719 transitions. Word has length 53 [2020-10-29 13:14:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:51,421 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 719 transitions. [2020-10-29 13:14:51,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:51,421 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 719 transitions. [2020-10-29 13:14:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:14:51,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:51,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:51,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:14:51,422 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:51,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1621177865, now seen corresponding path program 1 times [2020-10-29 13:14:51,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:51,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860198452] [2020-10-29 13:14:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:52,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:56,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:14:56,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:14:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:14:56,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:56,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:14:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:14:56,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:56,855 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:14:56,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:56,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:56,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:56,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:56,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:14:56,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:56,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:56,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:56,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:56,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:56,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:56,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860198452] [2020-10-29 13:14:56,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:56,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:14:56,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212989146] [2020-10-29 13:14:56,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:14:56,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:14:56,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:56,899 INFO L87 Difference]: Start difference. First operand 513 states and 719 transitions. Second operand 7 states. [2020-10-29 13:14:57,249 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:14:58,001 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:14:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:58,328 INFO L93 Difference]: Finished difference Result 1120 states and 1614 transitions. [2020-10-29 13:14:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:58,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:14:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:58,333 INFO L225 Difference]: With dead ends: 1120 [2020-10-29 13:14:58,333 INFO L226 Difference]: Without dead ends: 686 [2020-10-29 13:14:58,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-10-29 13:14:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 513. [2020-10-29 13:14:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-29 13:14:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 717 transitions. [2020-10-29 13:14:58,387 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 717 transitions. Word has length 54 [2020-10-29 13:14:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:58,387 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 717 transitions. [2020-10-29 13:14:58,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:14:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 717 transitions. [2020-10-29 13:14:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:14:58,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:58,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:58,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:14:58,389 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:58,390 INFO L82 PathProgramCache]: Analyzing trace with hash -751829396, now seen corresponding path program 1 times [2020-10-29 13:14:58,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:58,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963625976] [2020-10-29 13:14:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:58,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:03,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:15:03,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:15:03,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:03,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:03,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:15:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:15:03,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:03,925 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:03,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:03,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:03,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:03,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:03,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:03,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:03,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:03,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:03,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963625976] [2020-10-29 13:15:03,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:03,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:15:03,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103735696] [2020-10-29 13:15:03,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:15:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:15:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:15:03,966 INFO L87 Difference]: Start difference. First operand 513 states and 717 transitions. Second operand 10 states. [2020-10-29 13:15:04,304 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:15:05,399 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:15:05,757 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:15:06,810 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:15:07,137 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:15:07,434 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:15:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:07,775 INFO L93 Difference]: Finished difference Result 2376 states and 3510 transitions. [2020-10-29 13:15:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 13:15:07,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-29 13:15:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:07,791 INFO L225 Difference]: With dead ends: 2376 [2020-10-29 13:15:07,791 INFO L226 Difference]: Without dead ends: 2046 [2020-10-29 13:15:07,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 13:15:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-29 13:15:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 553. [2020-10-29 13:15:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-29 13:15:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 777 transitions. [2020-10-29 13:15:07,872 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 777 transitions. Word has length 56 [2020-10-29 13:15:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:07,872 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 777 transitions. [2020-10-29 13:15:07,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:15:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 777 transitions. [2020-10-29 13:15:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:15:07,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:07,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:07,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:15:07,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1738152195, now seen corresponding path program 1 times [2020-10-29 13:15:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348114711] [2020-10-29 13:15:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:07,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:12,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:15:12,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:15:12,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:15:12,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:12,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:15:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:13,390 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:13,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:13,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:13,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:13,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:13,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:15:13,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:13,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:13,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:13,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348114711] [2020-10-29 13:15:13,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:13,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455352848] [2020-10-29 13:15:13,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:13,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:13,452 INFO L87 Difference]: Start difference. First operand 553 states and 777 transitions. Second operand 8 states. [2020-10-29 13:15:13,896 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:15:14,990 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:15:15,374 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:15:16,521 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:15:16,849 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:15:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:17,237 INFO L93 Difference]: Finished difference Result 4961 states and 7383 transitions. [2020-10-29 13:15:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 13:15:17,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-29 13:15:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:17,263 INFO L225 Difference]: With dead ends: 4961 [2020-10-29 13:15:17,263 INFO L226 Difference]: Without dead ends: 4493 [2020-10-29 13:15:17,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:15:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2020-10-29 13:15:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 573. [2020-10-29 13:15:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-10-29 13:15:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 790 transitions. [2020-10-29 13:15:17,396 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 790 transitions. Word has length 56 [2020-10-29 13:15:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:17,397 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 790 transitions. [2020-10-29 13:15:17,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 790 transitions. [2020-10-29 13:15:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:15:17,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:17,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:17,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:15:17,398 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:17,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1920666788, now seen corresponding path program 1 times [2020-10-29 13:15:17,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:17,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981596366] [2020-10-29 13:15:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:17,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:18,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:15:18,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:15:18,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-29 13:15:18,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:18,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:18,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:18,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:18,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:15:18,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:18,943 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:18,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:18,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:18,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:15:18,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:18,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:19,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981596366] [2020-10-29 13:15:19,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:19,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:15:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187066896] [2020-10-29 13:15:19,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:19,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:19,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:19,013 INFO L87 Difference]: Start difference. First operand 573 states and 790 transitions. Second operand 9 states. [2020-10-29 13:15:19,356 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:15:20,413 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:15:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:21,020 INFO L93 Difference]: Finished difference Result 910 states and 1289 transitions. [2020-10-29 13:15:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:21,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-29 13:15:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:21,026 INFO L225 Difference]: With dead ends: 910 [2020-10-29 13:15:21,027 INFO L226 Difference]: Without dead ends: 903 [2020-10-29 13:15:21,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:15:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2020-10-29 13:15:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 568. [2020-10-29 13:15:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-10-29 13:15:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 783 transitions. [2020-10-29 13:15:21,118 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 783 transitions. Word has length 57 [2020-10-29 13:15:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:21,118 INFO L481 AbstractCegarLoop]: Abstraction has 568 states and 783 transitions. [2020-10-29 13:15:21,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 783 transitions. [2020-10-29 13:15:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:15:21,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:21,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:21,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:15:21,120 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1534292651, now seen corresponding path program 1 times [2020-10-29 13:15:21,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:21,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454962789] [2020-10-29 13:15:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:25,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:15:25,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:15:25,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4137 [2020-10-29 13:15:25,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:25,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:25,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:25,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:25,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:15:25,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:25,680 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:25,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:25,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:25,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:15:25,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:25,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:25,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:25,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454962789] [2020-10-29 13:15:25,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:25,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:15:25,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422044132] [2020-10-29 13:15:25,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:25,735 INFO L87 Difference]: Start difference. First operand 568 states and 783 transitions. Second operand 9 states. [2020-10-29 13:15:26,074 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:15:27,007 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:15:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:27,320 INFO L93 Difference]: Finished difference Result 652 states and 905 transitions. [2020-10-29 13:15:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:27,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-29 13:15:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:27,324 INFO L225 Difference]: With dead ends: 652 [2020-10-29 13:15:27,324 INFO L226 Difference]: Without dead ends: 647 [2020-10-29 13:15:27,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:15:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-29 13:15:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 565. [2020-10-29 13:15:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-29 13:15:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 779 transitions. [2020-10-29 13:15:27,420 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 779 transitions. Word has length 57 [2020-10-29 13:15:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:27,420 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 779 transitions. [2020-10-29 13:15:27,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 779 transitions. [2020-10-29 13:15:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:15:27,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:27,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:27,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:15:27,422 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:27,422 INFO L82 PathProgramCache]: Analyzing trace with hash -379923717, now seen corresponding path program 1 times [2020-10-29 13:15:27,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:27,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157225633] [2020-10-29 13:15:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:27,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:15:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:32,830 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:32,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:32,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:32,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:32,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:32,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:32,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:32,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157225633] [2020-10-29 13:15:32,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:32,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:32,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797633982] [2020-10-29 13:15:32,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:32,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:32,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:32,865 INFO L87 Difference]: Start difference. First operand 565 states and 779 transitions. Second operand 8 states. [2020-10-29 13:15:33,236 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:15:34,291 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:15:35,074 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:15:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:35,127 INFO L93 Difference]: Finished difference Result 827 states and 1162 transitions. [2020-10-29 13:15:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:15:35,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-29 13:15:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:35,138 INFO L225 Difference]: With dead ends: 827 [2020-10-29 13:15:35,138 INFO L226 Difference]: Without dead ends: 658 [2020-10-29 13:15:35,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:15:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-29 13:15:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 565. [2020-10-29 13:15:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-29 13:15:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 775 transitions. [2020-10-29 13:15:35,218 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 775 transitions. Word has length 58 [2020-10-29 13:15:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:35,219 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 775 transitions. [2020-10-29 13:15:35,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 775 transitions. [2020-10-29 13:15:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:15:35,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:35,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:35,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:15:35,220 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash 275799811, now seen corresponding path program 1 times [2020-10-29 13:15:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:35,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444759300] [2020-10-29 13:15:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:35,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:35,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:35,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:36,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:15:36,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:15:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:36,811 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:36,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:36,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:36,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:36,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444759300] [2020-10-29 13:15:36,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:36,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:15:36,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510508296] [2020-10-29 13:15:36,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:36,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:36,843 INFO L87 Difference]: Start difference. First operand 565 states and 775 transitions. Second operand 9 states. [2020-10-29 13:15:37,218 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:15:39,293 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:15:39,673 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:15:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:39,761 INFO L93 Difference]: Finished difference Result 1834 states and 2633 transitions. [2020-10-29 13:15:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:15:39,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-29 13:15:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:39,770 INFO L225 Difference]: With dead ends: 1834 [2020-10-29 13:15:39,770 INFO L226 Difference]: Without dead ends: 1821 [2020-10-29 13:15:39,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:15:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2020-10-29 13:15:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 554. [2020-10-29 13:15:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-29 13:15:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 762 transitions. [2020-10-29 13:15:39,867 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 762 transitions. Word has length 60 [2020-10-29 13:15:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:39,868 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 762 transitions. [2020-10-29 13:15:39,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 762 transitions. [2020-10-29 13:15:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:15:39,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:39,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:39,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:15:39,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:39,874 INFO L82 PathProgramCache]: Analyzing trace with hash 940215984, now seen corresponding path program 1 times [2020-10-29 13:15:39,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:39,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521050009] [2020-10-29 13:15:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:44,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:44,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:15:44,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:15:44,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:15:44,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:44,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:15:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:15:44,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:45,230 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:45,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:45,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:45,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:45,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:45,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:45,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:45,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:45,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:45,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:45,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:45,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:45,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:45,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521050009] [2020-10-29 13:15:45,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:45,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:45,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774680321] [2020-10-29 13:15:45,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:45,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:45,263 INFO L87 Difference]: Start difference. First operand 554 states and 762 transitions. Second operand 6 states. [2020-10-29 13:15:45,604 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:15:46,674 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:15:47,016 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:15:47,362 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:15:47,690 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:15:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:47,847 INFO L93 Difference]: Finished difference Result 2744 states and 4086 transitions. [2020-10-29 13:15:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:47,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-29 13:15:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:47,859 INFO L225 Difference]: With dead ends: 2744 [2020-10-29 13:15:47,859 INFO L226 Difference]: Without dead ends: 2379 [2020-10-29 13:15:47,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:15:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-10-29 13:15:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 916. [2020-10-29 13:15:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2020-10-29 13:15:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1296 transitions. [2020-10-29 13:15:48,039 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1296 transitions. Word has length 74 [2020-10-29 13:15:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:48,040 INFO L481 AbstractCegarLoop]: Abstraction has 916 states and 1296 transitions. [2020-10-29 13:15:48,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1296 transitions. [2020-10-29 13:15:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:48,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:48,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:48,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:15:48,043 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1510003793, now seen corresponding path program 1 times [2020-10-29 13:15:48,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:48,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215629854] [2020-10-29 13:15:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:53,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:15:53,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:15:53,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:53,404 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:53,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:53,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:53,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:53,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:53,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:53,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:53,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:53,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215629854] [2020-10-29 13:15:53,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:53,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:53,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952780826] [2020-10-29 13:15:53,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:53,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:53,438 INFO L87 Difference]: Start difference. First operand 916 states and 1296 transitions. Second operand 6 states. [2020-10-29 13:15:53,801 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:15:54,790 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:15:55,156 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:15:55,446 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:15:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:55,720 INFO L93 Difference]: Finished difference Result 3755 states and 5524 transitions. [2020-10-29 13:15:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:55,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:15:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:55,732 INFO L225 Difference]: With dead ends: 3755 [2020-10-29 13:15:55,733 INFO L226 Difference]: Without dead ends: 3028 [2020-10-29 13:15:55,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:15:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2020-10-29 13:15:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1966. [2020-10-29 13:15:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-10-29 13:15:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2844 transitions. [2020-10-29 13:15:56,125 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2844 transitions. Word has length 76 [2020-10-29 13:15:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:56,125 INFO L481 AbstractCegarLoop]: Abstraction has 1966 states and 2844 transitions. [2020-10-29 13:15:56,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2844 transitions. [2020-10-29 13:15:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:56,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:56,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:56,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:15:56,128 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1689385309, now seen corresponding path program 1 times [2020-10-29 13:15:56,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:56,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053761006] [2020-10-29 13:15:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:01,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:01,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:16:01,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:16:01,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:16:01,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:01,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:16:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:01,496 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:01,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:01,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:01,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:01,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:01,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:16:01,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:01,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:01,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053761006] [2020-10-29 13:16:01,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:01,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114797342] [2020-10-29 13:16:01,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:01,532 INFO L87 Difference]: Start difference. First operand 1966 states and 2844 transitions. Second operand 6 states. [2020-10-29 13:16:01,899 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:16:02,954 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:16:03,302 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:16:03,634 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:16:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:04,034 INFO L93 Difference]: Finished difference Result 5394 states and 7906 transitions. [2020-10-29 13:16:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:16:04,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:16:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:04,050 INFO L225 Difference]: With dead ends: 5394 [2020-10-29 13:16:04,050 INFO L226 Difference]: Without dead ends: 4341 [2020-10-29 13:16:04,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:16:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2020-10-29 13:16:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 3052. [2020-10-29 13:16:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3052 states. [2020-10-29 13:16:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4455 transitions. [2020-10-29 13:16:04,593 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4455 transitions. Word has length 76 [2020-10-29 13:16:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:04,594 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 4455 transitions. [2020-10-29 13:16:04,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4455 transitions. [2020-10-29 13:16:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:16:04,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:04,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:04,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:16:04,598 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:04,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1027724750, now seen corresponding path program 1 times [2020-10-29 13:16:04,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:04,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779708969] [2020-10-29 13:16:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:04,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:16:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,074 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:10,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:10,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:10,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:10,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:10,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:10,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:16:10,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:10,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:10,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:10,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779708969] [2020-10-29 13:16:10,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:10,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:10,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89108418] [2020-10-29 13:16:10,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:10,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:10,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:10,129 INFO L87 Difference]: Start difference. First operand 3052 states and 4455 transitions. Second operand 6 states. [2020-10-29 13:16:10,520 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:16:11,793 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:16:12,243 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:16:12,634 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:16:12,995 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:16:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:13,358 INFO L93 Difference]: Finished difference Result 6980 states and 10269 transitions. [2020-10-29 13:16:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:16:13,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:16:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:13,377 INFO L225 Difference]: With dead ends: 6980 [2020-10-29 13:16:13,377 INFO L226 Difference]: Without dead ends: 4117 [2020-10-29 13:16:13,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:16:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2020-10-29 13:16:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3052. [2020-10-29 13:16:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3052 states. [2020-10-29 13:16:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4419 transitions. [2020-10-29 13:16:13,953 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4419 transitions. Word has length 76 [2020-10-29 13:16:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:13,954 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 4419 transitions. [2020-10-29 13:16:13,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4419 transitions. [2020-10-29 13:16:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:16:13,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:13,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:13,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:16:13,960 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash -429388721, now seen corresponding path program 1 times [2020-10-29 13:16:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:13,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457895292] [2020-10-29 13:16:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:14,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:18,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:16:18,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:16:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:19,333 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:19,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:19,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:19,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457895292] [2020-10-29 13:16:19,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:19,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:19,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489585045] [2020-10-29 13:16:19,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:19,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:19,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:19,378 INFO L87 Difference]: Start difference. First operand 3052 states and 4419 transitions. Second operand 6 states. [2020-10-29 13:16:19,718 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:16:21,013 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:16:21,417 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:16:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:22,382 INFO L93 Difference]: Finished difference Result 10422 states and 15156 transitions. [2020-10-29 13:16:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:16:22,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:16:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:22,404 INFO L225 Difference]: With dead ends: 10422 [2020-10-29 13:16:22,404 INFO L226 Difference]: Without dead ends: 7559 [2020-10-29 13:16:22,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:16:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2020-10-29 13:16:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 7553. [2020-10-29 13:16:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7553 states. [2020-10-29 13:16:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7553 states to 7553 states and 10770 transitions. [2020-10-29 13:16:23,690 INFO L78 Accepts]: Start accepts. Automaton has 7553 states and 10770 transitions. Word has length 76 [2020-10-29 13:16:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:23,690 INFO L481 AbstractCegarLoop]: Abstraction has 7553 states and 10770 transitions. [2020-10-29 13:16:23,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7553 states and 10770 transitions. [2020-10-29 13:16:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:16:23,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:23,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:23,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:16:23,694 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:23,695 INFO L82 PathProgramCache]: Analyzing trace with hash 494998295, now seen corresponding path program 1 times [2020-10-29 13:16:23,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:23,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514136106] [2020-10-29 13:16:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:28,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:16:28,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:29,053 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:29,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:29,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:29,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:29,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:29,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:16:29,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:29,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:29,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:29,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:29,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:29,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:29,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514136106] [2020-10-29 13:16:29,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:29,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:29,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925017584] [2020-10-29 13:16:29,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:29,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:29,087 INFO L87 Difference]: Start difference. First operand 7553 states and 10770 transitions. Second operand 6 states. [2020-10-29 13:16:29,480 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:16:30,643 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:16:30,972 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:16:31,287 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:16:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:32,899 INFO L93 Difference]: Finished difference Result 15333 states and 21943 transitions. [2020-10-29 13:16:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:16:32,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:16:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:32,931 INFO L225 Difference]: With dead ends: 15333 [2020-10-29 13:16:32,931 INFO L226 Difference]: Without dead ends: 12360 [2020-10-29 13:16:32,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:16:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12360 states. [2020-10-29 13:16:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12360 to 9581. [2020-10-29 13:16:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9581 states. [2020-10-29 13:16:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 13677 transitions. [2020-10-29 13:16:34,539 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 13677 transitions. Word has length 76 [2020-10-29 13:16:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:34,540 INFO L481 AbstractCegarLoop]: Abstraction has 9581 states and 13677 transitions. [2020-10-29 13:16:34,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 13677 transitions. [2020-10-29 13:16:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:16:34,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:34,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:34,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:16:34,544 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -39997127, now seen corresponding path program 1 times [2020-10-29 13:16:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:34,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25897115] [2020-10-29 13:16:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:34,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:34,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:34,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:39,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:39,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:16:39,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:16:39,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:16:39,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:39,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:16:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:39,909 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:39,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:39,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:39,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:39,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:39,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:39,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25897115] [2020-10-29 13:16:39,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:39,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:39,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199820773] [2020-10-29 13:16:39,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:39,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:39,949 INFO L87 Difference]: Start difference. First operand 9581 states and 13677 transitions. Second operand 6 states. [2020-10-29 13:16:40,316 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:16:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:41,606 INFO L93 Difference]: Finished difference Result 11686 states and 16737 transitions. [2020-10-29 13:16:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:16:41,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-29 13:16:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:41,622 INFO L225 Difference]: With dead ends: 11686 [2020-10-29 13:16:41,622 INFO L226 Difference]: Without dead ends: 5355 [2020-10-29 13:16:41,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:16:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2020-10-29 13:16:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 3246. [2020-10-29 13:16:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2020-10-29 13:16:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4576 transitions. [2020-10-29 13:16:42,488 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4576 transitions. Word has length 77 [2020-10-29 13:16:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:42,488 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states and 4576 transitions. [2020-10-29 13:16:42,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4576 transitions. [2020-10-29 13:16:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:16:42,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:42,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:42,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:16:42,490 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 682112513, now seen corresponding path program 1 times [2020-10-29 13:16:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:42,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480457851] [2020-10-29 13:16:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:43,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:16:47,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:47,884 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:47,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:47,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:47,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:47,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480457851] [2020-10-29 13:16:47,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:47,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:16:47,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718009343] [2020-10-29 13:16:47,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:16:47,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:47,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:16:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:47,915 INFO L87 Difference]: Start difference. First operand 3246 states and 4576 transitions. Second operand 8 states. [2020-10-29 13:16:48,305 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:16:49,531 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:16:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:50,447 INFO L93 Difference]: Finished difference Result 8624 states and 12174 transitions. [2020-10-29 13:16:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:16:50,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-29 13:16:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:50,458 INFO L225 Difference]: With dead ends: 8624 [2020-10-29 13:16:50,459 INFO L226 Difference]: Without dead ends: 5470 [2020-10-29 13:16:50,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:16:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2020-10-29 13:16:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 3246. [2020-10-29 13:16:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2020-10-29 13:16:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4574 transitions. [2020-10-29 13:16:51,208 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4574 transitions. Word has length 78 [2020-10-29 13:16:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:51,208 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states and 4574 transitions. [2020-10-29 13:16:51,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:16:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4574 transitions. [2020-10-29 13:16:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:16:51,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:51,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:51,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:16:51,211 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1857116750, now seen corresponding path program 1 times [2020-10-29 13:16:51,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:51,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305010794] [2020-10-29 13:16:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:51,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:53,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:53,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:16:53,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:16:53,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2535 [2020-10-29 13:16:53,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:53,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:53,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:53,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-29 13:16:53,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:16:53,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:54,118 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:54,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:54,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305010794] [2020-10-29 13:16:54,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:54,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:54,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665406690] [2020-10-29 13:16:54,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:54,153 INFO L87 Difference]: Start difference. First operand 3246 states and 4574 transitions. Second operand 4 states. [2020-10-29 13:16:54,507 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:16:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:56,284 INFO L93 Difference]: Finished difference Result 9194 states and 12912 transitions. [2020-10-29 13:16:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:16:56,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-29 13:16:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:56,293 INFO L225 Difference]: With dead ends: 9194 [2020-10-29 13:16:56,293 INFO L226 Difference]: Without dead ends: 6052 [2020-10-29 13:16:56,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:16:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2020-10-29 13:16:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 5741. [2020-10-29 13:16:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5741 states. [2020-10-29 13:16:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5741 states to 5741 states and 7999 transitions. [2020-10-29 13:16:57,621 INFO L78 Accepts]: Start accepts. Automaton has 5741 states and 7999 transitions. Word has length 80 [2020-10-29 13:16:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:57,621 INFO L481 AbstractCegarLoop]: Abstraction has 5741 states and 7999 transitions. [2020-10-29 13:16:57,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:16:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5741 states and 7999 transitions. [2020-10-29 13:16:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:16:57,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:57,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:57,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:16:57,623 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash -383246828, now seen corresponding path program 1 times [2020-10-29 13:16:57,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:57,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153425674] [2020-10-29 13:16:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:57,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:59,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:16:59,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:59,368 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:16:59,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:59,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:59,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:59,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:59,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:59,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:16:59,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:59,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:59,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:59,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153425674] [2020-10-29 13:16:59,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:59,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:59,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614343882] [2020-10-29 13:16:59,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:59,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:59,402 INFO L87 Difference]: Start difference. First operand 5741 states and 7999 transitions. Second operand 4 states. [2020-10-29 13:16:59,757 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:17:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:02,563 INFO L93 Difference]: Finished difference Result 16343 states and 22599 transitions. [2020-10-29 13:17:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:17:02,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:17:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:02,575 INFO L225 Difference]: With dead ends: 16343 [2020-10-29 13:17:02,575 INFO L226 Difference]: Without dead ends: 10706 [2020-10-29 13:17:02,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:17:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10706 states. [2020-10-29 13:17:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10706 to 10087. [2020-10-29 13:17:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10087 states. [2020-10-29 13:17:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 13757 transitions. [2020-10-29 13:17:04,790 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 13757 transitions. Word has length 81 [2020-10-29 13:17:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:04,791 INFO L481 AbstractCegarLoop]: Abstraction has 10087 states and 13757 transitions. [2020-10-29 13:17:04,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:17:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 13757 transitions. [2020-10-29 13:17:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:17:04,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:04,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:04,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:17:04,792 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash -472393914, now seen corresponding path program 1 times [2020-10-29 13:17:04,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:04,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728854859] [2020-10-29 13:17:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:04,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:04,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:05,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:09,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:09,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:17:09,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:17:09,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:17:09,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:09,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:17:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:17:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:10,203 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:17:10,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:10,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:10,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:10,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:10,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:10,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:17:10,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:10,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:17:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:17:10,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:10,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728854859] [2020-10-29 13:17:10,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:10,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:17:10,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131641620] [2020-10-29 13:17:10,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:10,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:10,263 INFO L87 Difference]: Start difference. First operand 10087 states and 13757 transitions. Second operand 6 states. [2020-10-29 13:17:10,680 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:17:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:12,961 INFO L93 Difference]: Finished difference Result 15024 states and 20469 transitions. [2020-10-29 13:17:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:17:12,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:17:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:12,973 INFO L225 Difference]: With dead ends: 15024 [2020-10-29 13:17:12,973 INFO L226 Difference]: Without dead ends: 8349 [2020-10-29 13:17:12,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2020-10-29 13:17:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 6772. [2020-10-29 13:17:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6772 states. [2020-10-29 13:17:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 9202 transitions. [2020-10-29 13:17:14,611 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 9202 transitions. Word has length 82 [2020-10-29 13:17:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:14,612 INFO L481 AbstractCegarLoop]: Abstraction has 6772 states and 9202 transitions. [2020-10-29 13:17:14,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 9202 transitions. [2020-10-29 13:17:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:17:14,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:14,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:14,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:17:14,613 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1980542849, now seen corresponding path program 1 times [2020-10-29 13:17:14,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:14,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975368043] [2020-10-29 13:17:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:17:15,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:15,697 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:17:15,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:15,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:15,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:15,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:15,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:17:15,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:15,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:15,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:17:15,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:15,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:17:15,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975368043] [2020-10-29 13:17:15,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:15,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:17:15,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506208205] [2020-10-29 13:17:15,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:15,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:15,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:15,759 INFO L87 Difference]: Start difference. First operand 6772 states and 9202 transitions. Second operand 6 states. [2020-10-29 13:17:16,157 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:17:17,144 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:17:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:20,338 INFO L93 Difference]: Finished difference Result 19725 states and 27006 transitions. [2020-10-29 13:17:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:17:20,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:17:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:20,357 INFO L225 Difference]: With dead ends: 19725 [2020-10-29 13:17:20,357 INFO L226 Difference]: Without dead ends: 13010 [2020-10-29 13:17:20,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:17:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13010 states. [2020-10-29 13:17:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13010 to 13007. [2020-10-29 13:17:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13007 states. [2020-10-29 13:17:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13007 states to 13007 states and 17639 transitions. [2020-10-29 13:17:23,547 INFO L78 Accepts]: Start accepts. Automaton has 13007 states and 17639 transitions. Word has length 82 [2020-10-29 13:17:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:23,547 INFO L481 AbstractCegarLoop]: Abstraction has 13007 states and 17639 transitions. [2020-10-29 13:17:23,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 13007 states and 17639 transitions. [2020-10-29 13:17:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:17:23,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:23,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:23,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:17:23,549 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1131255769, now seen corresponding path program 1 times [2020-10-29 13:17:23,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:23,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144094622] [2020-10-29 13:17:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4472 [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:28,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:17:28,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:28,445 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:17:28,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:28,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:28,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:28,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:28,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144094622] [2020-10-29 13:17:28,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:28,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:28,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679630674] [2020-10-29 13:17:28,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:28,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:28,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:28,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:28,475 INFO L87 Difference]: Start difference. First operand 13007 states and 17639 transitions. Second operand 8 states. [2020-10-29 13:17:28,872 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:17:30,023 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:17:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:34,894 INFO L93 Difference]: Finished difference Result 32395 states and 43851 transitions. [2020-10-29 13:17:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:17:34,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:17:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:34,916 INFO L225 Difference]: With dead ends: 32395 [2020-10-29 13:17:34,917 INFO L226 Difference]: Without dead ends: 19458 [2020-10-29 13:17:34,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:17:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19458 states. [2020-10-29 13:17:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19458 to 13007. [2020-10-29 13:17:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13007 states. [2020-10-29 13:17:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13007 states to 13007 states and 17637 transitions. [2020-10-29 13:17:38,288 INFO L78 Accepts]: Start accepts. Automaton has 13007 states and 17637 transitions. Word has length 83 [2020-10-29 13:17:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:38,288 INFO L481 AbstractCegarLoop]: Abstraction has 13007 states and 17637 transitions. [2020-10-29 13:17:38,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 13007 states and 17637 transitions. [2020-10-29 13:17:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:17:38,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:38,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:38,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 13:17:38,290 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 734472288, now seen corresponding path program 1 times [2020-10-29 13:17:38,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:38,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488599401] [2020-10-29 13:17:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:38,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:38,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:38,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:41,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3595 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:17:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:42,657 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:17:42,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:42,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:42,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:42,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:42,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:42,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:17:42,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:42,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:42,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:42,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488599401] [2020-10-29 13:17:42,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:42,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-29 13:17:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016309854] [2020-10-29 13:17:42,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 13:17:42,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 13:17:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:17:42,700 INFO L87 Difference]: Start difference. First operand 13007 states and 17637 transitions. Second operand 15 states. [2020-10-29 13:17:43,249 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:17:45,668 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:17:46,066 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:17:46,471 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:17:46,862 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:17:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:56,786 INFO L93 Difference]: Finished difference Result 42256 states and 57313 transitions. [2020-10-29 13:17:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 13:17:56,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 85 [2020-10-29 13:17:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:56,839 INFO L225 Difference]: With dead ends: 42256 [2020-10-29 13:17:56,840 INFO L226 Difference]: Without dead ends: 35742 [2020-10-29 13:17:56,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:17:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35742 states. [2020-10-29 13:18:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35742 to 13007. [2020-10-29 13:18:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13007 states. [2020-10-29 13:18:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13007 states to 13007 states and 17636 transitions. [2020-10-29 13:18:00,661 INFO L78 Accepts]: Start accepts. Automaton has 13007 states and 17636 transitions. Word has length 85 [2020-10-29 13:18:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:00,662 INFO L481 AbstractCegarLoop]: Abstraction has 13007 states and 17636 transitions. [2020-10-29 13:18:00,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 13:18:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 13007 states and 17636 transitions. [2020-10-29 13:18:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:18:00,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:00,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:00,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 13:18:00,663 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 926160312, now seen corresponding path program 1 times [2020-10-29 13:18:00,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:00,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724106362] [2020-10-29 13:18:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:00,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:00,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:00,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:00,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-29 13:18:00,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 13:18:00,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:01,268 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:18:01,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:01,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:01,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:01,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:01,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724106362] [2020-10-29 13:18:01,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:01,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:18:01,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776045943] [2020-10-29 13:18:01,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:18:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:18:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:18:01,298 INFO L87 Difference]: Start difference. First operand 13007 states and 17636 transitions. Second operand 4 states.