/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/array-fpi/condg.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:53:10,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:53:10,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:53:10,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:53:10,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:53:10,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:53:10,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:53:10,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:53:10,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:53:10,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:53:10,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:53:10,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:53:10,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:53:10,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:53:10,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:53:10,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:53:10,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:53:10,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:53:10,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:53:10,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:53:10,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:53:10,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:53:10,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:53:10,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:53:10,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:53:10,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:53:10,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:53:10,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:53:10,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:53:10,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:53:10,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:53:10,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:53:10,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:53:10,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:53:10,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:53:10,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:53:10,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:53:10,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:53:10,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:53:10,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:53:10,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:53:10,603 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 03:53:10,633 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:53:10,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:53:10,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:53:10,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:53:10,636 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:53:10,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:53:10,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:53:10,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:53:10,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:53:10,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:53:10,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:53:10,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:53:10,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:53:10,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:53:10,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:53:10,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:53:10,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:53:10,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:53:10,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:53:10,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:53:10,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:53:10,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:53:10,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:53:10,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:53:10,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:53:10,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:53:10,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:53:10,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:53:10,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:53:10,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:53:11,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:53:11,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:53:11,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:53:11,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:53:11,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:53:11,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condg.c [2020-10-29 03:53:11,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a61ad30f/bbdff66f1e8d4923ae21f5caba8b0368/FLAGa8feeae6e [2020-10-29 03:53:11,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:53:11,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condg.c [2020-10-29 03:53:11,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a61ad30f/bbdff66f1e8d4923ae21f5caba8b0368/FLAGa8feeae6e [2020-10-29 03:53:12,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a61ad30f/bbdff66f1e8d4923ae21f5caba8b0368 [2020-10-29 03:53:12,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:53:12,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:53:12,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:53:12,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:53:12,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:53:12,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f70049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12, skipping insertion in model container [2020-10-29 03:53:12,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:53:12,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:53:12,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:53:12,506 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:53:12,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:53:12,549 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:53:12,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12 WrapperNode [2020-10-29 03:53:12,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:53:12,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:53:12,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:53:12,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:53:12,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... [2020-10-29 03:53:12,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:53:12,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:53:12,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:53:12,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:53:12,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:53:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:53:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:53:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:53:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:53:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:53:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:53:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:53:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:53:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:53:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:53:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:53:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:53:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:53:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:53:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:53:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:53:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:53:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:53:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:53:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:53:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:53:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:53:13,385 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:53:13,386 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 03:53:13,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:53:13 BoogieIcfgContainer [2020-10-29 03:53:13,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:53:13,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:53:13,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:53:13,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:53:13,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:53:12" (1/3) ... [2020-10-29 03:53:13,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706dacd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:53:13, skipping insertion in model container [2020-10-29 03:53:13,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:53:12" (2/3) ... [2020-10-29 03:53:13,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706dacd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:53:13, skipping insertion in model container [2020-10-29 03:53:13,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:53:13" (3/3) ... [2020-10-29 03:53:13,429 INFO L111 eAbstractionObserver]: Analyzing ICFG condg.c [2020-10-29 03:53:13,445 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:53:13,452 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:53:13,469 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:53:13,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:53:13,514 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:53:13,514 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:53:13,514 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:53:13,514 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:53:13,515 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:53:13,515 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:53:13,515 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:53:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-29 03:53:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 03:53:13,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:13,552 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] [2020-10-29 03:53:13,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1662535376, now seen corresponding path program 1 times [2020-10-29 03:53:13,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:13,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822533814] [2020-10-29 03:53:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:13,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:13,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:15,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:53:15,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:53:15,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1532 [2020-10-29 03:53:15,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:15,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:15,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:53:15,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:53:15,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:53:15,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:53:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:15,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:15,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:15,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:53:15,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:15,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:53:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:53:15,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:15,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:53:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:53:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:15,410 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 03:53:15,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822533814] [2020-10-29 03:53:15,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:53:15,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:53:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094196737] [2020-10-29 03:53:15,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:53:15,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:53:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:53:15,437 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-10-29 03:53:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:15,690 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2020-10-29 03:53:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:53:15,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-29 03:53:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:15,700 INFO L225 Difference]: With dead ends: 79 [2020-10-29 03:53:15,700 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 03:53:15,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:53:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 03:53:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-29 03:53:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 03:53:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-29 03:53:15,748 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-29 03:53:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:15,749 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-29 03:53:15,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:53:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-29 03:53:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 03:53:15,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:15,750 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] [2020-10-29 03:53:15,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:53:15,751 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:15,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1803017237, now seen corresponding path program 1 times [2020-10-29 03:53:15,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:15,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054351457] [2020-10-29 03:53:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:15,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:18,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:18,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 03:53:18,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:53:18,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-29 03:53:18,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:18,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:53:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:53:18,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:18,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:18,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:18,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:18,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:18,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:53:18,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:18,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:18,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:18,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:18,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:18,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:18,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:18,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:18,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:19,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:19,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:19,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:19,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:19,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:53:19,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054351457] [2020-10-29 03:53:19,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:19,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:53:19,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265596834] [2020-10-29 03:53:19,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:53:19,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:19,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:53:19,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:53:19,013 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-10-29 03:53:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:19,558 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-29 03:53:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:53:19,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 03:53:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:19,562 INFO L225 Difference]: With dead ends: 62 [2020-10-29 03:53:19,562 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:53:19,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:53:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:53:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-29 03:53:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 03:53:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-29 03:53:19,581 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 32 [2020-10-29 03:53:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:19,581 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-29 03:53:19,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:53:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-29 03:53:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 03:53:19,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:19,583 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] [2020-10-29 03:53:19,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:53:19,583 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:19,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2098923049, now seen corresponding path program 1 times [2020-10-29 03:53:19,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:19,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236776236] [2020-10-29 03:53:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:19,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:19,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:22,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 03:53:22,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:53:22,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2485 [2020-10-29 03:53:22,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:22,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:53:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:22,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 03:53:22,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:22,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:22,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:22,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:22,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:53:22,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:22,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:22,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:22,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:22,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:22,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:22,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:22,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:22,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:22,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:22,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:22,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 20 [2020-10-29 03:53:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:53:22,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236776236] [2020-10-29 03:53:22,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:22,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:53:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482409184] [2020-10-29 03:53:22,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:53:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:53:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:53:22,350 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 10 states. [2020-10-29 03:53:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:22,729 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-29 03:53:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 03:53:22,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-29 03:53:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:22,733 INFO L225 Difference]: With dead ends: 75 [2020-10-29 03:53:22,733 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 03:53:22,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:53:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 03:53:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-29 03:53:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:53:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-29 03:53:22,746 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 32 [2020-10-29 03:53:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:22,747 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-29 03:53:22,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:53:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-29 03:53:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:53:22,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:22,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:22,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:53:22,749 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:22,750 INFO L82 PathProgramCache]: Analyzing trace with hash -710113207, now seen corresponding path program 2 times [2020-10-29 03:53:22,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:22,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708564200] [2020-10-29 03:53:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:23,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:27,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:27,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:53:27,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:53:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:53:27,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:27,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:53:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:53:27,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:28,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:28,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 03:53:28,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:28,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:28,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:28,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:28,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:53:28,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:28,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:53:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:28,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:53:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708564200] [2020-10-29 03:53:28,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:28,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:53:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918055190] [2020-10-29 03:53:28,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:53:28,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:53:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:53:28,076 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 12 states. [2020-10-29 03:53:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:28,615 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-10-29 03:53:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:53:28,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-29 03:53:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:28,617 INFO L225 Difference]: With dead ends: 81 [2020-10-29 03:53:28,617 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:53:28,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:53:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:53:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-10-29 03:53:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:53:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-29 03:53:28,630 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 34 [2020-10-29 03:53:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:28,631 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-29 03:53:28,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:53:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-29 03:53:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:53:28,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:28,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:28,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:53:28,633 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1103140217, now seen corresponding path program 2 times [2020-10-29 03:53:28,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:28,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149010115] [2020-10-29 03:53:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:29,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:53:29,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:53:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-29 03:53:29,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:29,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:53:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 03:53:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:29,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:29,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:29,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:29,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:53:29,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:29,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:29,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:29,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:29,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:29,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:29,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:29,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:29,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:29,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:29,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:29,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:29,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:53:29,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149010115] [2020-10-29 03:53:29,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:29,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:53:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767362789] [2020-10-29 03:53:29,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:53:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:53:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:53:29,360 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2020-10-29 03:53:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:29,671 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-10-29 03:53:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:53:29,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-29 03:53:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:29,673 INFO L225 Difference]: With dead ends: 121 [2020-10-29 03:53:29,673 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:53:29,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:53:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:53:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-29 03:53:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:53:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-29 03:53:29,684 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 34 [2020-10-29 03:53:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:29,684 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-29 03:53:29,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:53:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-29 03:53:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:53:29,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:29,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:29,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:53:29,686 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1828461255, now seen corresponding path program 3 times [2020-10-29 03:53:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:29,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119503002] [2020-10-29 03:53:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:29,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:30,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:30,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:31,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:53:31,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:53:31,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-29 03:53:31,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:31,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:53:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:53:31,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:31,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:31,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:31,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:31,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:31,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:53:31,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:31,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:31,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:31,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:31,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:31,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:31,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:31,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:31,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:31,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:31,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:31,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:31,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:31,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:53:31,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119503002] [2020-10-29 03:53:31,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:31,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:53:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148480094] [2020-10-29 03:53:31,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:53:31,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:53:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:53:31,143 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 8 states. [2020-10-29 03:53:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:31,390 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-29 03:53:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:53:31,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-29 03:53:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:31,391 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:53:31,392 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:53:31,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:53:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:53:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-29 03:53:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:53:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-29 03:53:31,400 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 34 [2020-10-29 03:53:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:31,401 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-29 03:53:31,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:53:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-29 03:53:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:53:31,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:31,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:31,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:53:31,403 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1320003318, now seen corresponding path program 3 times [2020-10-29 03:53:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:31,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332754630] [2020-10-29 03:53:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:31,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:32,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:33,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:33,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:34,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:34,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:36,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:36,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:53:36,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:53:36,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-29 03:53:36,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:36,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:53:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:53:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:36,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:36,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:36,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:36,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:36,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:36,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:53:36,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:36,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:53:36,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:36,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:36,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:36,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:36,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:36,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:36,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:36,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:36,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:36,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:36,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:36,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:53:36,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332754630] [2020-10-29 03:53:36,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:36,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:53:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297137292] [2020-10-29 03:53:36,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:53:36,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:53:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:53:36,808 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 14 states. [2020-10-29 03:53:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:37,386 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-29 03:53:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:53:37,387 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 03:53:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:37,388 INFO L225 Difference]: With dead ends: 71 [2020-10-29 03:53:37,389 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 03:53:37,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:53:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 03:53:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-29 03:53:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:53:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-29 03:53:37,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 39 [2020-10-29 03:53:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:37,412 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-29 03:53:37,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:53:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-29 03:53:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:53:37,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:37,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:37,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:53:37,414 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash 733197304, now seen corresponding path program 1 times [2020-10-29 03:53:37,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:37,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321042669] [2020-10-29 03:53:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:37,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:37,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:37,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:37,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:37,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:38,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:39,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:40,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:42,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:42,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:53:42,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 03:53:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:53:42,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:42,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 03:53:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:53:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:42,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:42,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:42,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:42,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:42,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:53:42,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:42,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:42,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:42,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:42,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:42,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:42,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:42,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:42,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:42,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:42,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:53:42,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321042669] [2020-10-29 03:53:42,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:42,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 03:53:42,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866426425] [2020-10-29 03:53:42,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 03:53:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 03:53:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:53:42,561 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 7 states. [2020-10-29 03:53:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:42,752 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-29 03:53:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:53:42,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-29 03:53:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:42,754 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:53:42,754 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 03:53:42,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:53:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 03:53:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-29 03:53:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:53:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-29 03:53:42,778 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 39 [2020-10-29 03:53:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:42,779 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-29 03:53:42,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 03:53:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-29 03:53:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:53:42,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:42,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:42,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:53:42,782 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash 340170294, now seen corresponding path program 4 times [2020-10-29 03:53:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:42,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270963451] [2020-10-29 03:53:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:42,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:43,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:44,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:44,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:44,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:44,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:44,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:45,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:47,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:47,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:47,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:53:47,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-29 03:53:47,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:53:47,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:47,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:53:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:53:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:48,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:48,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:48,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:53:48,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:48,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:48,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:48,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:48,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:48,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:48,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:48,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:48,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:48,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:48,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:48,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:53:48,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270963451] [2020-10-29 03:53:48,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:48,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:53:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837335668] [2020-10-29 03:53:48,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:53:48,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:53:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:53:48,266 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 14 states. [2020-10-29 03:53:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:49,030 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-29 03:53:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:53:49,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 03:53:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:49,032 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:53:49,032 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:53:49,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:53:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:53:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-29 03:53:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 03:53:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-29 03:53:49,048 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 39 [2020-10-29 03:53:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:49,048 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-29 03:53:49,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:53:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-29 03:53:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:53:49,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:49,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:49,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:53:49,050 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2133246952, now seen corresponding path program 5 times [2020-10-29 03:53:49,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:49,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943646274] [2020-10-29 03:53:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:50,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:50,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:53:50,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:53:50,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-29 03:53:50,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:50,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:53:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:50,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:53:50,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:50,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:50,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:50,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:50,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:50,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:50,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:53:50,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:50,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:50,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:50,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:50,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:50,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:50,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:50,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:50,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:50,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:50,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 03:53:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943646274] [2020-10-29 03:53:50,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:50,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:53:50,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730625154] [2020-10-29 03:53:50,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:53:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:50,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:53:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:53:50,220 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 10 states. [2020-10-29 03:53:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:50,666 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2020-10-29 03:53:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:53:50,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-29 03:53:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:50,669 INFO L225 Difference]: With dead ends: 158 [2020-10-29 03:53:50,669 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 03:53:50,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:53:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 03:53:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-29 03:53:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 03:53:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2020-10-29 03:53:50,686 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 41 [2020-10-29 03:53:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:50,686 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2020-10-29 03:53:50,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:53:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2020-10-29 03:53:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:53:50,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:50,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:50,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:53:50,688 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1614969146, now seen corresponding path program 6 times [2020-10-29 03:53:50,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:50,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964436352] [2020-10-29 03:53:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:50,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:50,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:50,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:51,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:51,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:52,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:53,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:53,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:53,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:55,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:55,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:53:55,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 03:53:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:53:55,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:55,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:53:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:53:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:53:55,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:55,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:55,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:55,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:55,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:55,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:53:55,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:55,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:55,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:55,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:55,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:55,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:55,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:55,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:55,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:55,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:53:55,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964436352] [2020-10-29 03:53:55,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:55,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:53:55,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127228] [2020-10-29 03:53:55,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:53:55,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:55,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:53:55,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:53:55,871 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 10 states. [2020-10-29 03:53:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:56,525 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-10-29 03:53:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:53:56,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-29 03:53:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:56,527 INFO L225 Difference]: With dead ends: 131 [2020-10-29 03:53:56,528 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 03:53:56,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:53:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 03:53:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2020-10-29 03:53:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 03:53:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-29 03:53:56,542 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 43 [2020-10-29 03:53:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:56,542 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-29 03:53:56,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:53:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-29 03:53:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:53:56,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:56,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:56,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:53:56,543 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash 943994336, now seen corresponding path program 1 times [2020-10-29 03:53:56,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:56,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187114555] [2020-10-29 03:53:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:56,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:57,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:58,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:58,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:58,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:59,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:59,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:59,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:59,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:00,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:00,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:54:01,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:01,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:01,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:01,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:01,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:01,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:54:01,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:01,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:01,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:01,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:01,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:01,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 03:54:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:01,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:01,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:01,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:01,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:01,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:54:01,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:01,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:01,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:01,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:54:01,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187114555] [2020-10-29 03:54:01,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:01,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:54:01,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373362142] [2020-10-29 03:54:01,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:54:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:54:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:54:01,988 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 15 states. [2020-10-29 03:54:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:02,703 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-10-29 03:54:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:54:02,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-29 03:54:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:02,706 INFO L225 Difference]: With dead ends: 101 [2020-10-29 03:54:02,706 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:54:02,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:54:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:54:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-29 03:54:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 03:54:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2020-10-29 03:54:02,720 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 47 [2020-10-29 03:54:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:02,720 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2020-10-29 03:54:02,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:54:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2020-10-29 03:54:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:54:02,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:02,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:02,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:54:02,724 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1050150370, now seen corresponding path program 1 times [2020-10-29 03:54:02,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:02,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264984475] [2020-10-29 03:54:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:02,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:02,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:03,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:03,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:04,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:04,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:07,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:07,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:07,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:07,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:54:07,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 03:54:07,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:54:07,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:07,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:07,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:54:07,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 03:54:07,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:54:07,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:08,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:08,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:08,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:08,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:08,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:08,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:54:08,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:08,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:08,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:08,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:08,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:08,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:08,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:08,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:08,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:08,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:08,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:08,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:08,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:08,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:08,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 03:54:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:08,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:08,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:08,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:08,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:54:08,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:08,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 03:54:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 03:54:08,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:54:08,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264984475] [2020-10-29 03:54:08,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:08,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:54:08,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346429316] [2020-10-29 03:54:08,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:54:08,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:54:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:54:08,236 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 14 states. [2020-10-29 03:54:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:09,020 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-29 03:54:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:54:09,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-29 03:54:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:09,022 INFO L225 Difference]: With dead ends: 96 [2020-10-29 03:54:09,022 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 03:54:09,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:54:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 03:54:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-29 03:54:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:54:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-29 03:54:09,036 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 47 [2020-10-29 03:54:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:09,037 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-29 03:54:09,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:54:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-29 03:54:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:54:09,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:09,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 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 03:54:09,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:54:09,041 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash 168582531, now seen corresponding path program 4 times [2020-10-29 03:54:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:09,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940190787] [2020-10-29 03:54:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:09,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:09,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:09,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:09,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:10,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:10,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:10,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:10,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:11,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:11,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:11,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:12,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:12,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:13,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:13,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:13,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:13,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:54:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:54:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:14,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:14,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:14,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:14,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:14,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:14,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:14,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:14,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:14,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:14,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:14,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:14,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:14,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:14,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:54:14,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940190787] [2020-10-29 03:54:14,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:14,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:54:14,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943538267] [2020-10-29 03:54:14,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:54:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:14,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:54:14,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:54:14,578 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 16 states. [2020-10-29 03:54:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:15,303 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-10-29 03:54:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:54:15,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-29 03:54:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:15,304 INFO L225 Difference]: With dead ends: 80 [2020-10-29 03:54:15,304 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 03:54:15,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:54:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 03:54:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-29 03:54:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 03:54:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-29 03:54:15,316 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 46 [2020-10-29 03:54:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:15,316 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-29 03:54:15,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:54:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-29 03:54:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:54:15,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:15,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 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 03:54:15,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:54:15,317 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1832318847, now seen corresponding path program 7 times [2020-10-29 03:54:15,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:15,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942465286] [2020-10-29 03:54:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:15,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:15,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:15,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:15,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:15,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:16,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:16,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:16,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:17,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:17,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:17,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:18,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:20,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:54:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:54:20,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:21,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:21,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:21,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:21,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:21,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:21,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:21,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:21,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:21,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 03:54:21,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942465286] [2020-10-29 03:54:21,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:21,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:54:21,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637622658] [2020-10-29 03:54:21,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:54:21,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:21,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:54:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:54:21,186 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 18 states. [2020-10-29 03:54:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:22,305 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-10-29 03:54:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:54:22,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-29 03:54:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:22,307 INFO L225 Difference]: With dead ends: 97 [2020-10-29 03:54:22,307 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 03:54:22,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:54:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 03:54:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-29 03:54:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 03:54:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-29 03:54:22,319 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 46 [2020-10-29 03:54:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:22,319 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-29 03:54:22,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:54:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-29 03:54:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 03:54:22,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:22,320 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 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 03:54:22,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:54:22,321 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1456820319, now seen corresponding path program 8 times [2020-10-29 03:54:22,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:22,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151752477] [2020-10-29 03:54:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:24,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:24,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 03:54:24,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:54:24,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1806 [2020-10-29 03:54:24,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:24,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:54:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 03:54:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 03:54:24,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:24,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:24,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:24,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:24,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:24,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:24,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:54:24,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:24,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:24,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:24,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:24,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:24,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:24,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:24,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:24,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:24,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:24,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:24,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:24,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:54:24,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151752477] [2020-10-29 03:54:24,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:24,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:54:24,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473032861] [2020-10-29 03:54:24,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:54:24,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:24,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:54:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:54:24,318 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 12 states. [2020-10-29 03:54:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:25,232 INFO L93 Difference]: Finished difference Result 181 states and 208 transitions. [2020-10-29 03:54:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:54:25,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 03:54:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:25,234 INFO L225 Difference]: With dead ends: 181 [2020-10-29 03:54:25,235 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 03:54:25,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:54:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 03:54:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 95. [2020-10-29 03:54:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 03:54:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-29 03:54:25,257 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 48 [2020-10-29 03:54:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:25,257 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-29 03:54:25,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:54:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-29 03:54:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:54:25,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:25,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 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 03:54:25,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:54:25,259 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1664900292, now seen corresponding path program 9 times [2020-10-29 03:54:25,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:25,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566516148] [2020-10-29 03:54:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:27,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:27,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1940 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:54:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:27,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:27,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:27,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:27,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:54:27,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:27,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:27,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:27,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:27,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:27,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:27,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:27,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:27,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:27,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:27,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:27,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:27,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:27,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:27,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:54:27,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566516148] [2020-10-29 03:54:27,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:27,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:54:27,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873592690] [2020-10-29 03:54:27,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:54:27,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:54:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:54:27,395 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 12 states. [2020-10-29 03:54:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:28,161 INFO L93 Difference]: Finished difference Result 211 states and 240 transitions. [2020-10-29 03:54:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:54:28,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-29 03:54:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:28,164 INFO L225 Difference]: With dead ends: 211 [2020-10-29 03:54:28,164 INFO L226 Difference]: Without dead ends: 154 [2020-10-29 03:54:28,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:54:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-29 03:54:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-10-29 03:54:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 03:54:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-10-29 03:54:28,193 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 51 [2020-10-29 03:54:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:28,193 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-10-29 03:54:28,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:54:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-10-29 03:54:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:54:28,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:28,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:28,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:54:28,195 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 104730477, now seen corresponding path program 2 times [2020-10-29 03:54:28,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:28,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901048448] [2020-10-29 03:54:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:28,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:29,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:31,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:32,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 03:54:33,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:54:33,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:33,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:33,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:54:33,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:33,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:33,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:33,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:33,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:33,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:33,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:33,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:54:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:33,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:33,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:33,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:33,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:54:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901048448] [2020-10-29 03:54:33,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:33,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:54:33,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518451415] [2020-10-29 03:54:33,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:54:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:54:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:54:33,669 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 17 states. [2020-10-29 03:54:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:34,543 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2020-10-29 03:54:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:54:34,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-29 03:54:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:34,546 INFO L225 Difference]: With dead ends: 150 [2020-10-29 03:54:34,546 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 03:54:34,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:54:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 03:54:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2020-10-29 03:54:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 03:54:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2020-10-29 03:54:34,567 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 54 [2020-10-29 03:54:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:34,568 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2020-10-29 03:54:34,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:54:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2020-10-29 03:54:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:54:34,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:34,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:34,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:54:34,570 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1466712403, now seen corresponding path program 2 times [2020-10-29 03:54:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:34,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658620348] [2020-10-29 03:54:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:34,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:34,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:34,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:37,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:39,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:39,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 03:54:39,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:54:39,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:54:39,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:39,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:39,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:54:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 03:54:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:54:39,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:39,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:39,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:39,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:39,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:39,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:39,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:39,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:39,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:39,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:39,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:39,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:39,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:39,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:39,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:39,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:54:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:39,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:39,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:39,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:54:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:39,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 03:54:40,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658620348] [2020-10-29 03:54:40,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:40,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:54:40,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050113103] [2020-10-29 03:54:40,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:54:40,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:54:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:54:40,026 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 16 states. [2020-10-29 03:54:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:41,201 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2020-10-29 03:54:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:54:41,202 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-29 03:54:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:41,203 INFO L225 Difference]: With dead ends: 169 [2020-10-29 03:54:41,204 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 03:54:41,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:54:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 03:54:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-10-29 03:54:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 03:54:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-10-29 03:54:41,223 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 54 [2020-10-29 03:54:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:41,224 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-10-29 03:54:41,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:54:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-10-29 03:54:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:54:41,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:41,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 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 03:54:41,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:54:41,225 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1373920734, now seen corresponding path program 10 times [2020-10-29 03:54:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155514801] [2020-10-29 03:54:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:42,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:42,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:45,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:45,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:54:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:47,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:47,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:47,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:47,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:47,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:47,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:47,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:47,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:47,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:47,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:47,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:47,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:47,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 03:54:47,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155514801] [2020-10-29 03:54:47,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:47,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:54:47,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801680559] [2020-10-29 03:54:47,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:54:47,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:54:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:54:47,604 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 23 states. [2020-10-29 03:54:48,102 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-29 03:54:48,289 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 03:54:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:48,794 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2020-10-29 03:54:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:54:48,797 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-29 03:54:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:48,798 INFO L225 Difference]: With dead ends: 180 [2020-10-29 03:54:48,798 INFO L226 Difference]: Without dead ends: 145 [2020-10-29 03:54:48,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:54:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-29 03:54:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2020-10-29 03:54:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 03:54:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2020-10-29 03:54:48,826 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 53 [2020-10-29 03:54:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:48,826 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2020-10-29 03:54:48,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:54:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2020-10-29 03:54:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:54:48,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:48,828 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 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 03:54:48,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:54:48,828 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash 318517312, now seen corresponding path program 11 times [2020-10-29 03:54:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587222503] [2020-10-29 03:54:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:48,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3182 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:52,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:54:52,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:52,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:52,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:52,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:52,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:52,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:52,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:52,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:52,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:52,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:52,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:52,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:52,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:52,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 03:54:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587222503] [2020-10-29 03:54:52,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:52,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:54:52,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361394643] [2020-10-29 03:54:52,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:54:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:52,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:54:52,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:54:52,198 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand 14 states. [2020-10-29 03:54:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:53,094 INFO L93 Difference]: Finished difference Result 272 states and 307 transitions. [2020-10-29 03:54:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:54:53,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-29 03:54:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:53,097 INFO L225 Difference]: With dead ends: 272 [2020-10-29 03:54:53,097 INFO L226 Difference]: Without dead ends: 215 [2020-10-29 03:54:53,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:54:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-29 03:54:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2020-10-29 03:54:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-29 03:54:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2020-10-29 03:54:53,126 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 55 [2020-10-29 03:54:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:53,126 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2020-10-29 03:54:53,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:54:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2020-10-29 03:54:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 03:54:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:53,127 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 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 03:54:53,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:54:53,128 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2115684834, now seen corresponding path program 12 times [2020-10-29 03:54:53,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:53,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879903255] [2020-10-29 03:54:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:53,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:55,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:55,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:55,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:56,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:58,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 03:54:58,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 03:54:58,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-29 03:54:58,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:58,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:54:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:54:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:58,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:58,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:58,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:58,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:58,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:58,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:54:58,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879903255] [2020-10-29 03:54:58,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:58,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:54:58,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107993090] [2020-10-29 03:54:58,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:54:58,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:58,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:54:58,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:54:58,429 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand 14 states. [2020-10-29 03:54:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:59,548 INFO L93 Difference]: Finished difference Result 244 states and 267 transitions. [2020-10-29 03:54:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:54:59,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-29 03:54:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:59,553 INFO L225 Difference]: With dead ends: 244 [2020-10-29 03:54:59,554 INFO L226 Difference]: Without dead ends: 201 [2020-10-29 03:54:59,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:54:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-29 03:54:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 181. [2020-10-29 03:54:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-29 03:54:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 195 transitions. [2020-10-29 03:54:59,600 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 195 transitions. Word has length 57 [2020-10-29 03:54:59,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:59,601 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 195 transitions. [2020-10-29 03:54:59,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:54:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 195 transitions. [2020-10-29 03:54:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 03:54:59,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:59,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:59,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:54:59,602 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 414988119, now seen corresponding path program 3 times [2020-10-29 03:54:59,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:59,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279919004] [2020-10-29 03:54:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:59,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:04,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:04,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:04,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 03:55:04,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:55:04,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-29 03:55:04,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:04,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:55:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:55:04,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:05,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:05,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:05,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:05,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:05,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:05,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:05,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:05,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:55:05,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:05,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:05,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:05,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:05,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:05,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:55:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:05,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:05,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:05,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:05,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:05,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:05,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:05,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:55:05,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:05,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:55:05,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-29 03:55:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:05,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:55:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:55:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:55:05,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279919004] [2020-10-29 03:55:05,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:05,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:55:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118358510] [2020-10-29 03:55:05,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:55:05,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:05,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:55:05,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:55:05,166 INFO L87 Difference]: Start difference. First operand 181 states and 195 transitions. Second operand 18 states. [2020-10-29 03:55:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:06,170 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2020-10-29 03:55:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:55:06,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-29 03:55:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:06,172 INFO L225 Difference]: With dead ends: 199 [2020-10-29 03:55:06,172 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 03:55:06,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:55:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 03:55:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-29 03:55:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-29 03:55:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2020-10-29 03:55:06,199 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 62 [2020-10-29 03:55:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:06,199 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2020-10-29 03:55:06,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:55:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2020-10-29 03:55:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 03:55:06,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:06,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:06,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:55:06,200 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash 477027733, now seen corresponding path program 3 times [2020-10-29 03:55:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:06,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46936823] [2020-10-29 03:55:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:06,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:06,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:06,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:08,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:10,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 03:55:11,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:55:11,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:11,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:11,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:11,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:11,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:11,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:11,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:11,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 03:55:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:11,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:55:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:11,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-29 03:55:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:11,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:11,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:11,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:55:11,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:11,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-29 03:55:11,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46936823] [2020-10-29 03:55:11,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:11,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:55:11,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258551003] [2020-10-29 03:55:11,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:55:11,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:55:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:55:11,329 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand 8 states. [2020-10-29 03:55:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:11,515 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2020-10-29 03:55:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:55:11,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-29 03:55:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:11,525 INFO L225 Difference]: With dead ends: 203 [2020-10-29 03:55:11,525 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 03:55:11,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:55:11,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 03:55:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2020-10-29 03:55:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:55:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2020-10-29 03:55:11,546 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 62 [2020-10-29 03:55:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:11,546 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2020-10-29 03:55:11,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:55:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2020-10-29 03:55:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:55:11,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:11,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:11,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:55:11,548 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:11,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1653696952, now seen corresponding path program 4 times [2020-10-29 03:55:11,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:11,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668858782] [2020-10-29 03:55:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:12,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:13,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:16,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:55:16,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:55:16,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:55:16,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:16,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:55:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 03:55:16,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:16,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:16,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:16,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:16,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:16,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:16,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:16,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:16,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:16,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:16,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 03:55:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:16,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:16,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:55:16,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:16,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:55:16,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 03:55:17,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668858782] [2020-10-29 03:55:17,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:17,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:55:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954786673] [2020-10-29 03:55:17,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:55:17,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:55:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:55:17,008 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2020-10-29 03:55:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:17,980 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-10-29 03:55:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:55:17,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-29 03:55:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:17,982 INFO L225 Difference]: With dead ends: 154 [2020-10-29 03:55:17,982 INFO L226 Difference]: Without dead ends: 151 [2020-10-29 03:55:17,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:55:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-29 03:55:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2020-10-29 03:55:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-29 03:55:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 152 transitions. [2020-10-29 03:55:18,005 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 152 transitions. Word has length 61 [2020-10-29 03:55:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:18,005 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 152 transitions. [2020-10-29 03:55:18,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:55:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 152 transitions. [2020-10-29 03:55:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 03:55:18,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:18,006 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 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 03:55:18,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:55:18,006 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1432676647, now seen corresponding path program 13 times [2020-10-29 03:55:18,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:18,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738847387] [2020-10-29 03:55:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:18,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:18,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:18,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:18,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:19,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:20,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:21,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:23,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:23,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 03:55:23,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:55:23,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:55:23,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:23,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:23,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:55:23,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:23,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:55:23,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:23,623 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-29 03:55:23,764 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-29 03:55:23,909 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-29 03:55:24,056 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-29 03:55:24,205 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-29 03:55:24,559 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-29 03:55:24,733 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-29 03:55:24,936 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-29 03:55:26,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:26,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:26,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:26,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:26,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:26,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:26,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:26,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:26,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 03:55:26,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738847387] [2020-10-29 03:55:26,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:26,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:55:26,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570821810] [2020-10-29 03:55:26,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:55:26,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:55:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:55:26,057 INFO L87 Difference]: Start difference. First operand 145 states and 152 transitions. Second operand 28 states. [2020-10-29 03:55:26,481 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-29 03:55:26,746 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2020-10-29 03:55:26,943 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-29 03:55:27,220 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2020-10-29 03:55:27,497 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-29 03:55:28,034 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 62 [2020-10-29 03:55:28,276 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-29 03:55:28,619 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 03:55:28,979 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-29 03:55:29,274 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 03:55:29,956 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-29 03:55:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:30,584 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2020-10-29 03:55:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:55:30,585 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-29 03:55:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:30,586 INFO L225 Difference]: With dead ends: 202 [2020-10-29 03:55:30,586 INFO L226 Difference]: Without dead ends: 176 [2020-10-29 03:55:30,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 03:55:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-29 03:55:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 150. [2020-10-29 03:55:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-29 03:55:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2020-10-29 03:55:30,608 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 60 [2020-10-29 03:55:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:30,608 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2020-10-29 03:55:30,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:55:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2020-10-29 03:55:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 03:55:30,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:30,609 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 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 03:55:30,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:55:30,610 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:30,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218423, now seen corresponding path program 14 times [2020-10-29 03:55:30,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:30,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919666494] [2020-10-29 03:55:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:30,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:35,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4915 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:55:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:35,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:35,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:35,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:35,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:35,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:35,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:35,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:35,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:35,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:35,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:35,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:35,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:55:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919666494] [2020-10-29 03:55:35,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:35,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:55:35,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982658905] [2020-10-29 03:55:35,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:55:35,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:35,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:55:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:55:35,766 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand 16 states. [2020-10-29 03:55:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:37,357 INFO L93 Difference]: Finished difference Result 286 states and 307 transitions. [2020-10-29 03:55:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:55:37,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-29 03:55:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:37,360 INFO L225 Difference]: With dead ends: 286 [2020-10-29 03:55:37,360 INFO L226 Difference]: Without dead ends: 242 [2020-10-29 03:55:37,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:55:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-29 03:55:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 168. [2020-10-29 03:55:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-29 03:55:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 177 transitions. [2020-10-29 03:55:37,390 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 177 transitions. Word has length 62 [2020-10-29 03:55:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:37,390 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 177 transitions. [2020-10-29 03:55:37,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:55:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 177 transitions. [2020-10-29 03:55:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:55:37,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:37,392 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 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 03:55:37,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:55:37,392 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash -411409820, now seen corresponding path program 15 times [2020-10-29 03:55:37,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598766035] [2020-10-29 03:55:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:42,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:42,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 03:55:42,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:55:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4715 [2020-10-29 03:55:42,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:42,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:55:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:55:42,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:42,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:42,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:42,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:42,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:42,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:42,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:42,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:42,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 03:55:42,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598766035] [2020-10-29 03:55:42,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:42,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:55:42,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433528027] [2020-10-29 03:55:42,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:55:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:55:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:55:42,345 INFO L87 Difference]: Start difference. First operand 168 states and 177 transitions. Second operand 16 states. [2020-10-29 03:55:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:43,438 INFO L93 Difference]: Finished difference Result 317 states and 339 transitions. [2020-10-29 03:55:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:55:43,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-29 03:55:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:43,441 INFO L225 Difference]: With dead ends: 317 [2020-10-29 03:55:43,441 INFO L226 Difference]: Without dead ends: 248 [2020-10-29 03:55:43,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:55:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-29 03:55:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 215. [2020-10-29 03:55:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 03:55:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 225 transitions. [2020-10-29 03:55:43,478 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 225 transitions. Word has length 65 [2020-10-29 03:55:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:43,478 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 225 transitions. [2020-10-29 03:55:43,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:55:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 225 transitions. [2020-10-29 03:55:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 03:55:43,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:43,480 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:43,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:55:43,480 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:43,480 INFO L82 PathProgramCache]: Analyzing trace with hash 680637234, now seen corresponding path program 5 times [2020-10-29 03:55:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:43,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517554643] [2020-10-29 03:55:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:43,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:44,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:45,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:45,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:45,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:46,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:47,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:48,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:48,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:55:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 03:55:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:49,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:49,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:49,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:49,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 03:55:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:49,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:49,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:49,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:55:49,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:49,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 03:55:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:49,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:49,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:49,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:49,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:55:49,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 03:55:49,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517554643] [2020-10-29 03:55:49,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:49,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:55:49,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866590996] [2020-10-29 03:55:49,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:55:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:55:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:55:49,299 INFO L87 Difference]: Start difference. First operand 215 states and 225 transitions. Second operand 20 states. [2020-10-29 03:55:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:50,754 INFO L93 Difference]: Finished difference Result 222 states and 231 transitions. [2020-10-29 03:55:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:55:50,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-29 03:55:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:50,756 INFO L225 Difference]: With dead ends: 222 [2020-10-29 03:55:50,756 INFO L226 Difference]: Without dead ends: 217 [2020-10-29 03:55:50,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:55:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-29 03:55:50,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-10-29 03:55:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-29 03:55:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 226 transitions. [2020-10-29 03:55:50,792 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 226 transitions. Word has length 69 [2020-10-29 03:55:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:50,792 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 226 transitions. [2020-10-29 03:55:50,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:55:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 226 transitions. [2020-10-29 03:55:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 03:55:50,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:50,794 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 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 03:55:50,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:55:50,794 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1822873990, now seen corresponding path program 16 times [2020-10-29 03:55:50,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:50,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858508885] [2020-10-29 03:55:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:51,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:52,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:53,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:55,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:55,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:55:55,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:56,987 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 03:55:57,137 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-29 03:55:57,405 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-29 03:55:59,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:59,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:59,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:59,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:59,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:59,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:59,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-29 03:55:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858508885] [2020-10-29 03:55:59,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:59,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 03:55:59,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430918914] [2020-10-29 03:55:59,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 03:55:59,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:59,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 03:55:59,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:55:59,078 INFO L87 Difference]: Start difference. First operand 217 states and 226 transitions. Second operand 31 states. [2020-10-29 03:56:00,301 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 60 [2020-10-29 03:56:00,705 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-29 03:56:00,992 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-29 03:56:01,295 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2020-10-29 03:56:01,495 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-29 03:56:01,905 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-29 03:56:02,331 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2020-10-29 03:56:02,843 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2020-10-29 03:56:03,350 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 55 [2020-10-29 03:56:03,728 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-10-29 03:56:04,112 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 43 [2020-10-29 03:56:04,355 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2020-10-29 03:56:04,625 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 39 [2020-10-29 03:56:04,831 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-10-29 03:56:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:05,993 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2020-10-29 03:56:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 03:56:05,993 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-29 03:56:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:05,994 INFO L225 Difference]: With dead ends: 266 [2020-10-29 03:56:05,995 INFO L226 Difference]: Without dead ends: 237 [2020-10-29 03:56:05,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=470, Invalid=3190, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 03:56:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-29 03:56:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-10-29 03:56:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-29 03:56:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 247 transitions. [2020-10-29 03:56:06,027 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 247 transitions. Word has length 67 [2020-10-29 03:56:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:06,027 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 247 transitions. [2020-10-29 03:56:06,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 03:56:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 247 transitions. [2020-10-29 03:56:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 03:56:06,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:06,028 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 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 03:56:06,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:56:06,028 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1549006952, now seen corresponding path program 17 times [2020-10-29 03:56:06,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:06,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142433499] [2020-10-29 03:56:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:06,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:11,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 03:56:11,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:56:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:11,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:11,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:11,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:11,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:11,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:11,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:11,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 03:56:11,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142433499] [2020-10-29 03:56:11,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:11,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:56:11,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609377691] [2020-10-29 03:56:11,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:56:11,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:56:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:56:11,336 INFO L87 Difference]: Start difference. First operand 236 states and 247 transitions. Second operand 18 states. [2020-10-29 03:56:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:13,398 INFO L93 Difference]: Finished difference Result 391 states and 418 transitions. [2020-10-29 03:56:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:56:13,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-29 03:56:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:13,402 INFO L225 Difference]: With dead ends: 391 [2020-10-29 03:56:13,403 INFO L226 Difference]: Without dead ends: 327 [2020-10-29 03:56:13,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:56:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-29 03:56:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 242. [2020-10-29 03:56:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-29 03:56:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 253 transitions. [2020-10-29 03:56:13,455 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 253 transitions. Word has length 69 [2020-10-29 03:56:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:13,455 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 253 transitions. [2020-10-29 03:56:13,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:56:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 253 transitions. [2020-10-29 03:56:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 03:56:13,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:13,457 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 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 03:56:13,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:56:13,457 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash 182981267, now seen corresponding path program 18 times [2020-10-29 03:56:13,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:13,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010281035] [2020-10-29 03:56:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:13,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:18,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:56:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:18,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:18,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:18,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:18,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:18,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:18,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:18,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:18,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:18,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-29 03:56:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010281035] [2020-10-29 03:56:18,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:18,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:56:18,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846187530] [2020-10-29 03:56:18,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:56:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:56:18,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:56:18,759 INFO L87 Difference]: Start difference. First operand 242 states and 253 transitions. Second operand 18 states. [2020-10-29 03:56:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:20,245 INFO L93 Difference]: Finished difference Result 408 states and 434 transitions. [2020-10-29 03:56:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:56:20,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-29 03:56:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:20,249 INFO L225 Difference]: With dead ends: 408 [2020-10-29 03:56:20,249 INFO L226 Difference]: Without dead ends: 333 [2020-10-29 03:56:20,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:56:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-29 03:56:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 296. [2020-10-29 03:56:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-29 03:56:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 309 transitions. [2020-10-29 03:56:20,300 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 309 transitions. Word has length 72 [2020-10-29 03:56:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:20,300 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 309 transitions. [2020-10-29 03:56:20,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:56:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 309 transitions. [2020-10-29 03:56:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:56:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:20,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 03:56:20,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:56:20,302 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash -479836644, now seen corresponding path program 6 times [2020-10-29 03:56:20,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:20,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287598388] [2020-10-29 03:56:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:20,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:21,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:56:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:25,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 03:56:25,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:25,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:25,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:25,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:25,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:25,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:25,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:25,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:25,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:25,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:26,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 03:56:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:26,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:26,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:26,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:26,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:26,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:56:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:56:26,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:26,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 03:56:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:26,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:26,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:56:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:56:26,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:26,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-29 03:56:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:26,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:56:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:56:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 03:56:26,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287598388] [2020-10-29 03:56:26,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:26,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:56:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52963136] [2020-10-29 03:56:26,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:56:26,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:56:26,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:56:26,049 INFO L87 Difference]: Start difference. First operand 296 states and 309 transitions. Second operand 21 states. [2020-10-29 03:56:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:27,795 INFO L93 Difference]: Finished difference Result 299 states and 311 transitions. [2020-10-29 03:56:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:56:27,795 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-29 03:56:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:27,797 INFO L225 Difference]: With dead ends: 299 [2020-10-29 03:56:27,797 INFO L226 Difference]: Without dead ends: 243 [2020-10-29 03:56:27,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:56:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-29 03:56:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2020-10-29 03:56:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-29 03:56:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 255 transitions. [2020-10-29 03:56:27,843 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 255 transitions. Word has length 77 [2020-10-29 03:56:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:27,843 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 255 transitions. [2020-10-29 03:56:27,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:56:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 255 transitions. [2020-10-29 03:56:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 03:56:27,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:27,845 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:27,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 03:56:27,845 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1061167889, now seen corresponding path program 7 times [2020-10-29 03:56:27,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:27,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866207939] [2020-10-29 03:56:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:27,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:31,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:56:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:32,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 03:56:32,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:33,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-29 03:56:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:56:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:56:33,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-29 03:56:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:56:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 4 proven. 75 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 03:56:33,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866207939] [2020-10-29 03:56:33,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:33,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:56:33,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19218856] [2020-10-29 03:56:33,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:56:33,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:56:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:56:33,621 INFO L87 Difference]: Start difference. First operand 243 states and 255 transitions. Second operand 22 states. [2020-10-29 03:56:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:34,985 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2020-10-29 03:56:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:56:34,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-10-29 03:56:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:34,989 INFO L225 Difference]: With dead ends: 268 [2020-10-29 03:56:34,989 INFO L226 Difference]: Without dead ends: 265 [2020-10-29 03:56:34,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:56:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-29 03:56:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2020-10-29 03:56:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-29 03:56:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 269 transitions. [2020-10-29 03:56:35,050 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 269 transitions. Word has length 76 [2020-10-29 03:56:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:35,050 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 269 transitions. [2020-10-29 03:56:35,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:56:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 269 transitions. [2020-10-29 03:56:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 03:56:35,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:35,054 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 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 03:56:35,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 03:56:35,054 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 335524145, now seen corresponding path program 19 times [2020-10-29 03:56:35,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:35,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349223598] [2020-10-29 03:56:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:35,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:36,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:38,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:40,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:56:40,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:40,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:56:40,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:40,644 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-29 03:56:40,782 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-29 03:56:40,946 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-29 03:56:41,123 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 03:56:41,320 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-29 03:56:41,486 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-29 03:56:41,719 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-29 03:56:41,921 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-29 03:56:42,200 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-29 03:56:42,374 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-29 03:56:42,586 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-29 03:56:42,950 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-29 03:56:43,315 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-29 03:56:43,654 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-29 03:56:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:44,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:44,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 101 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-29 03:56:44,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349223598] [2020-10-29 03:56:44,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:44,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 03:56:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524407931] [2020-10-29 03:56:44,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 03:56:44,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 03:56:44,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:56:44,487 INFO L87 Difference]: Start difference. First operand 259 states and 269 transitions. Second operand 36 states. [2020-10-29 03:56:45,686 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-10-29 03:56:45,995 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-29 03:56:46,308 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2020-10-29 03:56:46,916 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 60 [2020-10-29 03:56:47,165 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 51 [2020-10-29 03:56:47,549 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2020-10-29 03:56:47,993 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-29 03:56:48,414 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-29 03:56:48,674 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-29 03:56:48,999 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-29 03:56:49,216 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-29 03:56:49,494 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44