/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:31:39,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:31:39,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:31:39,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:31:39,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:31:39,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:31:39,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:31:39,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:31:39,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:31:39,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:31:39,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:31:39,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:31:39,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:31:39,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:31:39,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:31:39,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:31:39,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:31:39,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:31:39,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:31:39,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:31:39,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:31:39,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:31:39,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:31:39,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:31:39,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:31:39,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:31:39,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:31:39,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:31:39,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:31:39,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:31:39,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:31:39,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:31:39,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:31:39,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:31:39,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:31:39,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:31:39,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:31:39,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:31:39,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:31:39,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:31:39,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:31:39,771 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 [2020-10-28 09:31:39,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:31:39,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:31:39,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:31:39,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:31:39,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:31:39,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:31:39,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:31:39,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:31:39,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:31:39,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:31:39,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:31:39,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:31:39,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:31:39,825 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:31:39,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:31:39,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:31:39,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:31:39,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:31:39,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:31:39,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:31:39,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:31:39,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:31:39,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:31:39,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:31:39,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:31:39,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:31:39,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:31:39,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:31:39,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:31:39,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:31:40,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:31:40,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:31:40,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:31:40,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:31:40,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:31:40,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-28 09:31:40,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43645937a/ab832bf9230241988133bb1c9822888f/FLAGa0de7b183 [2020-10-28 09:31:40,889 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:31:40,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-28 09:31:40,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43645937a/ab832bf9230241988133bb1c9822888f/FLAGa0de7b183 [2020-10-28 09:31:41,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43645937a/ab832bf9230241988133bb1c9822888f [2020-10-28 09:31:41,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:31:41,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:31:41,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:31:41,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:31:41,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:31:41,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568077e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41, skipping insertion in model container [2020-10-28 09:31:41,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:31:41,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:31:41,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:31:41,459 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:31:41,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:31:41,504 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:31:41,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41 WrapperNode [2020-10-28 09:31:41,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:31:41,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:31:41,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:31:41,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:31:41,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (1/1) ... [2020-10-28 09:31:41,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:31:41,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:31:41,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:31:41,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:31:41,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (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 [2020-10-28 09:31:41,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:31:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:31:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:31:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:31:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:31:41,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:31:41,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:31:41,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:31:41,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:31:41,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:31:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:31:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:31:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:31:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:31:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:31:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:31:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:31:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:31:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:31:41,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:31:41,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:31:41,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:31:42,262 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:31:42,262 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 09:31:42,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:31:42 BoogieIcfgContainer [2020-10-28 09:31:42,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:31:42,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:31:42,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:31:42,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:31:42,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:31:41" (1/3) ... [2020-10-28 09:31:42,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70171a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:31:42, skipping insertion in model container [2020-10-28 09:31:42,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:31:41" (2/3) ... [2020-10-28 09:31:42,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70171a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:31:42, skipping insertion in model container [2020-10-28 09:31:42,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:31:42" (3/3) ... [2020-10-28 09:31:42,276 INFO L111 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2020-10-28 09:31:42,290 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:31:42,299 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:31:42,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:31:42,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:31:42,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:31:42,357 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:31:42,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:31:42,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:31:42,358 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:31:42,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:31:42,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:31:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 09:31:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:31:42,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:31:42,394 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] [2020-10-28 09:31:42,394 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:31:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:31:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash 880128442, now seen corresponding path program 1 times [2020-10-28 09:31:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:31:42,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265117534] [2020-10-28 09:31:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:31:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:43,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:43,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:43,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:31:43,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:31:43,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-28 09:31:43,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:43,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:43,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:31:43,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:31:43,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:31:43,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:31:43,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:31:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:43,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:43,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:31:43,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:31:43,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:31:43,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:43,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:31:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:31:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:31:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:31:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:31:43,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265117534] [2020-10-28 09:31:43,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:31:43,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:31:43,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476409723] [2020-10-28 09:31:43,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:31:43,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:31:43,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:31:43,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:31:43,881 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 09:31:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:31:43,987 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-28 09:31:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:31:43,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 09:31:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:31:43,997 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:31:43,997 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:31:44,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:31:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:31:44,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 09:31:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:31:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-28 09:31:44,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-28 09:31:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:31:44,042 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-28 09:31:44,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:31:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-28 09:31:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:31:44,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:31:44,044 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] [2020-10-28 09:31:44,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:31:44,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:31:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:31:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash -986798976, now seen corresponding path program 1 times [2020-10-28 09:31:44,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:31:44,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583256190] [2020-10-28 09:31:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:31:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:44,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:44,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:44,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:44,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:45,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:45,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:31:45,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:31:45,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-28 09:31:45,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:45,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:31:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:31:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:31:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:31:45,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:31:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:45,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:45,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:31:45,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:31:45,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:31:45,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:45,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:45,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:31:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:31:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:31:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:31:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:31:45,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583256190] [2020-10-28 09:31:45,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:31:45,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:31:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919022265] [2020-10-28 09:31:45,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:31:45,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:31:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:31:45,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:31:45,279 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-10-28 09:31:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:31:45,454 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-28 09:31:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:31:45,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 09:31:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:31:45,458 INFO L225 Difference]: With dead ends: 63 [2020-10-28 09:31:45,458 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:31:45,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:31:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:31:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-28 09:31:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:31:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 09:31:45,473 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2020-10-28 09:31:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:31:45,473 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 09:31:45,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:31:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 09:31:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:31:45,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:31:45,475 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] [2020-10-28 09:31:45,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:31:45,475 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:31:45,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:31:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2053054216, now seen corresponding path program 1 times [2020-10-28 09:31:45,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:31:45,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697351402] [2020-10-28 09:31:45,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:31:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:45,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:45,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:45,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:45,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:46,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:50,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:50,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:31:50,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:31:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:31:50,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:50,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:31:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:31:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:31:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:31:50,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:31:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:50,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:50,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:50,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:31:50,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:31:50,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:31:50,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:50,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:31:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:31:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:31:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:31:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:31:50,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697351402] [2020-10-28 09:31:50,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:31:50,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:31:50,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405926532] [2020-10-28 09:31:50,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:31:50,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:31:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:31:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:31:50,668 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-28 09:31:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:31:51,021 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-28 09:31:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:31:51,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 09:31:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:31:51,026 INFO L225 Difference]: With dead ends: 71 [2020-10-28 09:31:51,026 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 09:31:51,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:31:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 09:31:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-28 09:31:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:31:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 09:31:51,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2020-10-28 09:31:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:31:51,053 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 09:31:51,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:31:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 09:31:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:31:51,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:31:51,057 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:31:51,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:31:51,057 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:31:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:31:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1775554160, now seen corresponding path program 2 times [2020-10-28 09:31:51,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:31:51,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370996509] [2020-10-28 09:31:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:31:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:51,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:56,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:56,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:31:56,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:31:56,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:31:56,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:56,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:56,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:31:56,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:31:56,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:31:56,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:31:57,128 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 09:31:57,340 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-28 09:31:57,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:31:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:31:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:31:57,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:31:57,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:31:57,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:31:57,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:31:57,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:31:57,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:31:57,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:31:57,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:31:57,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:31:57,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:31:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:31:57,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370996509] [2020-10-28 09:31:57,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:31:57,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:31:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904408747] [2020-10-28 09:31:57,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:31:57,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:31:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:31:57,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:31:57,975 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 22 states. [2020-10-28 09:32:01,169 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-28 09:32:01,365 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-28 09:32:01,694 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-28 09:32:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:32:02,859 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2020-10-28 09:32:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:32:02,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-28 09:32:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:32:02,865 INFO L225 Difference]: With dead ends: 162 [2020-10-28 09:32:02,867 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 09:32:02,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 09:32:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 09:32:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 91. [2020-10-28 09:32:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 09:32:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-28 09:32:02,908 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 37 [2020-10-28 09:32:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:32:02,908 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-28 09:32:02,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:32:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-28 09:32:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 09:32:02,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:32:02,910 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:32:02,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:32:02,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:32:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:32:02,911 INFO L82 PathProgramCache]: Analyzing trace with hash 126047378, now seen corresponding path program 3 times [2020-10-28 09:32:02,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:32:02,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925293865] [2020-10-28 09:32:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:32:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:02,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:02,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:03,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:04,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:05,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:07,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:07,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:07,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:07,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 09:32:07,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:32:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:32:07,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:07,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:07,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:32:07,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:32:07,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:32:07,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:08,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:32:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:08,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:08,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:08,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:32:08,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:08,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:32:08,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:08,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:32:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:32:08,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:32:08,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925293865] [2020-10-28 09:32:08,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:32:08,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:32:08,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223006932] [2020-10-28 09:32:08,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:32:08,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:32:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:32:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:32:08,076 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2020-10-28 09:32:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:32:08,777 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2020-10-28 09:32:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:32:08,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 09:32:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:32:08,783 INFO L225 Difference]: With dead ends: 190 [2020-10-28 09:32:08,783 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 09:32:08,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:32:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 09:32:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-10-28 09:32:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 09:32:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2020-10-28 09:32:08,808 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 39 [2020-10-28 09:32:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:32:08,809 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2020-10-28 09:32:08,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:32:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2020-10-28 09:32:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:32:08,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:32:08,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-28 09:32:08,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:32:08,811 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:32:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:32:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1281252182, now seen corresponding path program 4 times [2020-10-28 09:32:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:32:08,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249414998] [2020-10-28 09:32:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:32:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:08,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:08,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:09,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:09,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:11,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:13,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:13,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 09:32:13,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:32:13,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:32:13,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:13,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:32:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:32:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:32:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:13,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:32:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:13,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:13,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:13,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:32:13,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:13,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:32:13,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:13,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:32:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:32:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:32:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249414998] [2020-10-28 09:32:14,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:32:14,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:32:14,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142011108] [2020-10-28 09:32:14,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:32:14,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:32:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:32:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:32:14,004 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 12 states. [2020-10-28 09:32:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:32:14,483 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2020-10-28 09:32:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:32:14,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 09:32:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:32:14,485 INFO L225 Difference]: With dead ends: 172 [2020-10-28 09:32:14,485 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:32:14,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:32:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:32:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-28 09:32:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:32:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-28 09:32:14,506 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 43 [2020-10-28 09:32:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:32:14,507 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-28 09:32:14,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:32:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-28 09:32:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:32:14,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:32:14,511 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-28 09:32:14,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:32:14,511 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:32:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:32:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1971639481, now seen corresponding path program 1 times [2020-10-28 09:32:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:32:14,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852940443] [2020-10-28 09:32:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:32:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:14,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:15,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:15,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:16,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:17,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:17,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:19,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:32:19,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:20,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:32:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:20,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:20,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:20,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:32:20,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:32:20,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:20,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:20,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:32:20,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:20,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:32:20,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:20,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:32:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:20,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:20,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:20,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:32:20,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:20,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:32:20,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:20,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:20,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:32:20,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:20,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:32:20,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:32:21,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852940443] [2020-10-28 09:32:21,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:32:21,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:32:21,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363705442] [2020-10-28 09:32:21,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:32:21,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:32:21,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:32:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:32:21,002 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 24 states. [2020-10-28 09:32:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:32:22,411 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-10-28 09:32:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:32:22,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-28 09:32:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:32:22,413 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:32:22,413 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:32:22,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:32:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:32:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 09:32:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 09:32:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-28 09:32:22,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 45 [2020-10-28 09:32:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:32:22,428 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-28 09:32:22,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:32:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-28 09:32:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:32:22,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:32:22,435 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 09:32:22,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:32:22,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:32:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:32:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1613421592, now seen corresponding path program 5 times [2020-10-28 09:32:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:32:22,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209329106] [2020-10-28 09:32:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:32:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:23,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:24,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:26,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:32:28,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5545 [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 09:32:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:29,059 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-28 09:32:29,295 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2020-10-28 09:32:29,466 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-28 09:32:29,672 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-10-28 09:32:29,857 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2020-10-28 09:32:30,130 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 59 [2020-10-28 09:32:30,362 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 52 [2020-10-28 09:32:30,640 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2020-10-28 09:32:30,856 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-28 09:32:31,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:32:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:31,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:31,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:32:31,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:31,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:32:31,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:31,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:32:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:32:31,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:32:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209329106] [2020-10-28 09:32:31,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:32:31,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:32:31,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063517992] [2020-10-28 09:32:31,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:32:31,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:32:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:32:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:32:31,217 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 25 states. [2020-10-28 09:32:31,525 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-28 09:32:31,906 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-28 09:32:32,130 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-28 09:32:32,362 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2020-10-28 09:32:32,618 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2020-10-28 09:32:32,888 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-28 09:32:33,155 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2020-10-28 09:32:33,497 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-28 09:32:33,930 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-10-28 09:32:34,083 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-28 09:32:34,291 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-28 09:32:34,488 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2020-10-28 09:32:34,743 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-10-28 09:32:34,994 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-10-28 09:32:35,240 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-10-28 09:32:35,463 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-28 09:32:35,653 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-28 09:32:35,883 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-28 09:32:36,487 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2020-10-28 09:32:36,740 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-28 09:32:37,008 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-28 09:32:37,281 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-10-28 09:32:37,955 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-28 09:32:38,529 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2020-10-28 09:32:38,778 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-28 09:32:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:32:39,289 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2020-10-28 09:32:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:32:39,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2020-10-28 09:32:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:32:39,291 INFO L225 Difference]: With dead ends: 131 [2020-10-28 09:32:39,291 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:32:39,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=640, Invalid=2900, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:32:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:32:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 83. [2020-10-28 09:32:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:32:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-28 09:32:39,333 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 45 [2020-10-28 09:32:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:32:39,335 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-28 09:32:39,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:32:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-28 09:32:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:32:39,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:32:39,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-28 09:32:39,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:32:39,340 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:32:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:32:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2100878618, now seen corresponding path program 6 times [2020-10-28 09:32:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:32:39,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55271800] [2020-10-28 09:32:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:32:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:39,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:39,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:44,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:32:44,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:44,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:32:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:44,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:44,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:44,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:32:44,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:44,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:32:44,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:44,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:44,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:32:44,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:44,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:32:44,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:32:44,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55271800] [2020-10-28 09:32:44,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:32:44,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:32:44,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856047001] [2020-10-28 09:32:44,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:32:44,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:32:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:32:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:32:44,549 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 12 states. [2020-10-28 09:32:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:32:45,449 INFO L93 Difference]: Finished difference Result 192 states and 215 transitions. [2020-10-28 09:32:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:32:45,449 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:32:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:32:45,451 INFO L225 Difference]: With dead ends: 192 [2020-10-28 09:32:45,451 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 09:32:45,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:32:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 09:32:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2020-10-28 09:32:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 09:32:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-10-28 09:32:45,481 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 47 [2020-10-28 09:32:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:32:45,481 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-10-28 09:32:45,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:32:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-10-28 09:32:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:32:45,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:32:45,483 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 09:32:45,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:32:45,484 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:32:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:32:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 110458689, now seen corresponding path program 2 times [2020-10-28 09:32:45,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:32:45,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508706030] [2020-10-28 09:32:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:32:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:45,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:45,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:46,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:49,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:50,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:50,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:32:50,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:32:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:32:50,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:50,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:32:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:32:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 09:32:50,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:51,028 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-28 09:32:51,167 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-28 09:32:51,306 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-28 09:32:51,565 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-28 09:32:52,050 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-28 09:32:52,195 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-28 09:32:52,417 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-28 09:32:52,618 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-28 09:32:52,948 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-28 09:32:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:32:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:53,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:53,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:53,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:32:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:53,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:32:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:32:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:32:53,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:32:53,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:32:53,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:32:53,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:32:53,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:32:53,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:32:53,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:32:53,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:32:53,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:32:53,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:32:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:32:53,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508706030] [2020-10-28 09:32:53,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:32:53,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:32:53,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297431389] [2020-10-28 09:32:53,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:32:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:32:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:32:53,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:32:53,513 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand 28 states. [2020-10-28 09:32:53,801 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-28 09:32:54,286 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-10-28 09:32:54,495 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-28 09:32:54,697 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-28 09:32:54,928 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-28 09:32:55,132 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-28 09:32:55,443 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-28 09:32:55,765 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-28 09:32:56,258 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2020-10-28 09:32:56,453 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-28 09:32:56,622 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-28 09:32:56,886 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-28 09:32:57,149 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-28 09:32:57,527 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-28 09:32:57,812 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-28 09:32:58,001 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-28 09:32:58,352 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-28 09:32:58,612 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-28 09:32:58,870 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-28 09:32:59,081 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-28 09:32:59,327 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-28 09:32:59,570 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-28 09:33:00,166 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-28 09:33:00,698 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-28 09:33:01,039 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-28 09:33:01,385 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-28 09:33:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:01,473 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2020-10-28 09:33:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:33:01,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-10-28 09:33:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:01,475 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:33:01,475 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 09:33:01,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=739, Invalid=3421, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 09:33:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 09:33:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2020-10-28 09:33:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 09:33:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-28 09:33:01,516 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 53 [2020-10-28 09:33:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:01,516 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-28 09:33:01,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:33:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-28 09:33:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:33:01,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:01,519 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 09:33:01,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:33:01,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -705290592, now seen corresponding path program 7 times [2020-10-28 09:33:01,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615201563] [2020-10-28 09:33:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:07,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5414 [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:33:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:33:07,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:33:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:33:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:09,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:09,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:09,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:33:09,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:33:09,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:09,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:33:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:33:09,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:33:09,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615201563] [2020-10-28 09:33:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:33:09,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:33:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478422555] [2020-10-28 09:33:09,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:33:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:33:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:33:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:33:09,111 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 27 states. [2020-10-28 09:33:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:11,599 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2020-10-28 09:33:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:33:11,601 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-10-28 09:33:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:11,603 INFO L225 Difference]: With dead ends: 178 [2020-10-28 09:33:11,603 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 09:33:11,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:33:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 09:33:11,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2020-10-28 09:33:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 09:33:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-10-28 09:33:11,632 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 53 [2020-10-28 09:33:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:11,633 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-10-28 09:33:11,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:33:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-10-28 09:33:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:33:11,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:11,634 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-28 09:33:11,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:33:11,635 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1348641246, now seen corresponding path program 8 times [2020-10-28 09:33:11,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:11,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35942215] [2020-10-28 09:33:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:11,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:11,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:11,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:16,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:16,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:33:16,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:33:16,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 09:33:16,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:16,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:33:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:33:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:33:16,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:16,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:33:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:16,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:16,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:16,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:33:16,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:16,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:33:16,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:16,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:33:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:33:16,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:33:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 09:33:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35942215] [2020-10-28 09:33:16,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:33:16,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:33:16,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509060332] [2020-10-28 09:33:16,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:33:16,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:33:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:33:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:33:16,917 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 14 states. [2020-10-28 09:33:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:17,869 INFO L93 Difference]: Finished difference Result 278 states and 311 transitions. [2020-10-28 09:33:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:33:17,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-28 09:33:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:17,872 INFO L225 Difference]: With dead ends: 278 [2020-10-28 09:33:17,872 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 09:33:17,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:33:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 09:33:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 157. [2020-10-28 09:33:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 09:33:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2020-10-28 09:33:17,909 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 55 [2020-10-28 09:33:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:17,910 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2020-10-28 09:33:17,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:33:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2020-10-28 09:33:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:33:17,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:17,911 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 09:33:17,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:33:17,912 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash -785720982, now seen corresponding path program 3 times [2020-10-28 09:33:17,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:17,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698274767] [2020-10-28 09:33:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:18,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:18,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:22,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:33:22,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:33:22,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 09:33:22,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:25,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:33:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:25,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:25,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:25,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:33:25,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:25,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:33:25,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:25,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:25,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:33:25,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:25,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:33:25,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:25,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:33:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:25,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:33:25,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:25,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:33:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:25,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:25,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:33:25,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:25,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:33:25,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:25,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:33:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:33:25,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:33:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698274767] [2020-10-28 09:33:25,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:33:25,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:33:25,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682013735] [2020-10-28 09:33:25,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:33:25,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:33:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:33:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:33:25,179 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand 29 states. [2020-10-28 09:33:25,460 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-28 09:33:25,866 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-28 09:33:26,404 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-28 09:33:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:27,441 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2020-10-28 09:33:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:33:27,441 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-10-28 09:33:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:27,443 INFO L225 Difference]: With dead ends: 168 [2020-10-28 09:33:27,443 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 09:33:27,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:33:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 09:33:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-28 09:33:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 09:33:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2020-10-28 09:33:27,468 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 61 [2020-10-28 09:33:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:27,468 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2020-10-28 09:33:27,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:33:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2020-10-28 09:33:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:33:27,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:27,469 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:33:27,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:33:27,470 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 694225638, now seen corresponding path program 9 times [2020-10-28 09:33:27,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:27,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807305776] [2020-10-28 09:33:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:27,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:32,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:33:32,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:33:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:33:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:32,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:33:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:32,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:32,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:32,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:33:32,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:33:32,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807305776] [2020-10-28 09:33:32,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:33:32,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:33:32,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316741970] [2020-10-28 09:33:32,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:33:32,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:33:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:33:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:33:32,703 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand 14 states. [2020-10-28 09:33:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:33,896 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2020-10-28 09:33:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:33:33,897 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-28 09:33:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:33,898 INFO L225 Difference]: With dead ends: 188 [2020-10-28 09:33:33,898 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 09:33:33,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:33:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 09:33:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2020-10-28 09:33:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 09:33:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2020-10-28 09:33:33,920 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 59 [2020-10-28 09:33:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:33,921 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2020-10-28 09:33:33,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:33:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2020-10-28 09:33:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:33:33,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:33,922 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 09:33:33,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:33:33,922 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -363220535, now seen corresponding path program 4 times [2020-10-28 09:33:33,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:33,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035756725] [2020-10-28 09:33:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:33,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:34,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:39,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:39,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:33:39,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 09:33:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:39,465 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 09:33:39,603 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-28 09:33:41,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:33:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:41,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:41,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:33:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:41,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:33:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:41,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:33:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:33:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:41,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:33:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:41,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:41,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:33:41,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:33:41,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035756725] [2020-10-28 09:33:41,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:33:41,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:33:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455851571] [2020-10-28 09:33:41,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:33:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:33:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:33:41,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:33:41,831 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand 31 states. [2020-10-28 09:33:42,085 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-28 09:33:42,289 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-28 09:33:42,700 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-28 09:33:42,925 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 09:33:43,197 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-28 09:33:43,484 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-28 09:33:43,673 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 09:33:44,255 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 111 [2020-10-28 09:33:44,487 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 09:33:44,737 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-28 09:33:45,027 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-10-28 09:33:45,286 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-28 09:33:45,584 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-28 09:33:45,959 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-28 09:33:46,263 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-28 09:33:46,616 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-28 09:33:46,887 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 09:33:47,080 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 09:33:47,261 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-28 09:33:47,509 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-28 09:33:48,223 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-10-28 09:33:49,687 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-28 09:33:49,986 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2020-10-28 09:33:50,429 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-28 09:33:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:50,450 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-28 09:33:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:33:50,451 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-10-28 09:33:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:50,452 INFO L225 Difference]: With dead ends: 126 [2020-10-28 09:33:50,452 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:33:50,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=479, Invalid=4077, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:33:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:33:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-28 09:33:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 09:33:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-28 09:33:50,481 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 61 [2020-10-28 09:33:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:50,481 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-28 09:33:50,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:33:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-28 09:33:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:33:50,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:50,482 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-28 09:33:50,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:33:50,482 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1423640280, now seen corresponding path program 10 times [2020-10-28 09:33:50,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:50,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979181123] [2020-10-28 09:33:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:50,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:55,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:33:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:33:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 09:33:55,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:56,075 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 09:33:57,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:33:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:57,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:33:57,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:33:57,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:33:57,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:33:57,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:33:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 09:33:57,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979181123] [2020-10-28 09:33:57,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:33:57,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:33:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793505408] [2020-10-28 09:33:57,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:33:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:33:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:33:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:33:57,646 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 26 states. [2020-10-28 09:33:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:33:59,846 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-10-28 09:33:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:33:59,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-28 09:33:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:33:59,849 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:33:59,849 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 09:33:59,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:33:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 09:33:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2020-10-28 09:33:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:33:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-28 09:33:59,883 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 61 [2020-10-28 09:33:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:33:59,883 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-28 09:33:59,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:33:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-28 09:33:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 09:33:59,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:33:59,885 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-28 09:33:59,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:33:59,885 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:33:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:33:59,886 INFO L82 PathProgramCache]: Analyzing trace with hash 596166314, now seen corresponding path program 11 times [2020-10-28 09:33:59,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:33:59,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776629154] [2020-10-28 09:33:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:33:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:33:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:04,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:34:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:05,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:34:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:05,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:05,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:05,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:34:05,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:05,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:34:05,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:05,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:34:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:34:05,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:34:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776629154] [2020-10-28 09:34:05,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:34:05,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:34:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110498373] [2020-10-28 09:34:05,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:34:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:34:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:34:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:34:05,137 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 16 states. [2020-10-28 09:34:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:34:06,345 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2020-10-28 09:34:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:34:06,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-28 09:34:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:34:06,349 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:34:06,349 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:34:06,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:34:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:34:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 197. [2020-10-28 09:34:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 09:34:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 211 transitions. [2020-10-28 09:34:06,403 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 211 transitions. Word has length 63 [2020-10-28 09:34:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:34:06,403 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 211 transitions. [2020-10-28 09:34:06,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:34:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 211 transitions. [2020-10-28 09:34:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:34:06,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:34:06,405 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 09:34:06,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:34:06,405 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:34:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:34:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash -160429070, now seen corresponding path program 5 times [2020-10-28 09:34:06,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:34:06,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597242909] [2020-10-28 09:34:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:34:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:06,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:07,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:08,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:08,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:11,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:11,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:34:11,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 09:34:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:13,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:34:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:13,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:13,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:34:13,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:13,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:34:13,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:13,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:34:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:34:14,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:34:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:14,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:14,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:34:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:14,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:34:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:14,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:14,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:34:14,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:34:14,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:14,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:34:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:34:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:34:14,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597242909] [2020-10-28 09:34:14,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:34:14,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:34:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226387682] [2020-10-28 09:34:14,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:34:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:34:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:34:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:34:14,059 INFO L87 Difference]: Start difference. First operand 197 states and 211 transitions. Second operand 34 states. [2020-10-28 09:34:14,852 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-28 09:34:15,448 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-28 09:34:15,626 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-28 09:34:15,801 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-28 09:34:16,075 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2020-10-28 09:34:16,267 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-28 09:34:16,512 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-28 09:34:17,162 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-28 09:34:17,844 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-28 09:34:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:34:18,725 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-10-28 09:34:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:34:18,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 69 [2020-10-28 09:34:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:34:18,728 INFO L225 Difference]: With dead ends: 204 [2020-10-28 09:34:18,728 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 09:34:18,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=512, Invalid=2910, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:34:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 09:34:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-10-28 09:34:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 09:34:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2020-10-28 09:34:18,781 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 69 [2020-10-28 09:34:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:34:18,782 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2020-10-28 09:34:18,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:34:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2020-10-28 09:34:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:34:18,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:34:18,783 INFO L422 BasicCegarLoop]: trace histogram [6, 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] [2020-10-28 09:34:18,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:34:18,783 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:34:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:34:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1595309934, now seen corresponding path program 12 times [2020-10-28 09:34:18,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:34:18,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586157659] [2020-10-28 09:34:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:34:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:18,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:19,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:23,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:23,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:34:23,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:34:23,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:34:23,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:23,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:23,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:34:23,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:34:23,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:34:23,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:24,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:34:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:24,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:24,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:34:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 09:34:24,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586157659] [2020-10-28 09:34:24,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:34:24,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:34:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628767659] [2020-10-28 09:34:24,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:34:24,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:34:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:34:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:34:24,077 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand 16 states. [2020-10-28 09:34:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:34:25,828 INFO L93 Difference]: Finished difference Result 277 states and 296 transitions. [2020-10-28 09:34:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:34:25,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-28 09:34:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:34:25,831 INFO L225 Difference]: With dead ends: 277 [2020-10-28 09:34:25,831 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 09:34:25,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:34:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 09:34:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 196. [2020-10-28 09:34:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 09:34:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-28 09:34:25,880 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 67 [2020-10-28 09:34:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:34:25,880 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-28 09:34:25,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:34:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-28 09:34:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:34:25,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:34:25,882 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-28 09:34:25,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:34:25,882 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:34:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:34:25,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935535, now seen corresponding path program 6 times [2020-10-28 09:34:25,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:34:25,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980300620] [2020-10-28 09:34:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:34:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:27,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:31,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5414 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 09:34:31,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:32,858 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-28 09:34:33,260 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-28 09:34:33,674 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 73 [2020-10-28 09:34:34,114 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 74 [2020-10-28 09:34:34,315 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-28 09:34:34,666 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 81 [2020-10-28 09:34:35,371 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 68 [2020-10-28 09:34:36,225 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 79 [2020-10-28 09:34:36,702 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 82 [2020-10-28 09:34:37,135 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 78 [2020-10-28 09:34:37,622 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 83 [2020-10-28 09:34:38,074 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 77 [2020-10-28 09:34:38,608 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 85 [2020-10-28 09:34:39,186 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 84 [2020-10-28 09:34:39,769 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 80 [2020-10-28 09:34:40,130 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 73 [2020-10-28 09:34:40,611 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 86 [2020-10-28 09:34:41,165 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 84 [2020-10-28 09:34:41,626 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 79 [2020-10-28 09:34:42,057 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 72 [2020-10-28 09:34:42,488 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-10-28 09:34:42,879 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2020-10-28 09:34:43,237 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2020-10-28 09:34:43,538 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 34 [2020-10-28 09:34:43,848 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2020-10-28 09:34:44,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:34:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:44,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:44,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:44,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:34:44,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:44,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:34:44,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:44,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:34:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:34:44,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:44,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:34:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:34:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:34:44,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:34:44,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:34:44,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:34:44,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:34:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:34:44,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980300620] [2020-10-28 09:34:44,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:34:44,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 09:34:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590412740] [2020-10-28 09:34:44,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 09:34:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:34:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 09:34:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:34:44,913 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 45 states. [2020-10-28 09:34:45,426 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-10-28 09:34:45,767 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-28 09:34:47,627 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 243 DAG size of output: 203 [2020-10-28 09:34:47,995 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2020-10-28 09:34:50,108 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 243 DAG size of output: 203 [2020-10-28 09:34:50,549 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-28 09:34:50,979 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 49 [2020-10-28 09:34:51,320 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-28 09:34:51,633 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-28 09:34:52,016 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-10-28 09:34:52,390 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-28 09:34:52,767 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-28 09:34:57,286 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 294 DAG size of output: 212 [2020-10-28 09:34:57,572 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-10-28 09:34:57,870 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-28 09:34:58,167 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2020-10-28 09:34:58,975 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 105 [2020-10-28 09:34:59,345 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 92 [2020-10-28 09:35:00,651 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 189 DAG size of output: 120 [2020-10-28 09:35:05,519 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 294 DAG size of output: 211 [2020-10-28 09:35:06,497 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 124 [2020-10-28 09:35:07,250 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 124 [2020-10-28 09:35:08,265 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 123 [2020-10-28 09:35:08,716 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 104 [2020-10-28 09:35:09,225 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 113 [2020-10-28 09:35:12,970 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 260 DAG size of output: 155 [2020-10-28 09:35:13,275 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-28 09:35:14,511 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 112 [2020-10-28 09:35:15,902 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 189 DAG size of output: 123 [2020-10-28 09:35:16,215 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-28 09:35:17,136 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 100 [2020-10-28 09:35:17,492 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-28 09:35:18,210 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 107 [2020-10-28 09:35:22,058 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 260 DAG size of output: 154 [2020-10-28 09:35:22,581 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-28 09:35:23,009 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2020-10-28 09:35:23,340 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-28 09:35:26,925 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 263 DAG size of output: 193 [2020-10-28 09:35:27,505 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 81 [2020-10-28 09:35:28,142 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 47 [2020-10-28 09:35:28,454 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48