/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=DEEPEST --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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:22:49,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:22:49,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:22:49,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:22:49,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:22:49,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:22:49,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:22:49,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:22:49,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:22:49,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:22:49,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:22:49,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:22:49,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:22:49,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:22:49,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:22:49,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:22:49,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:22:49,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:22:49,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:22:49,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:22:49,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:22:49,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:22:49,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:22:49,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:22:49,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:22:49,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:22:49,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:22:49,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:22:49,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:22:49,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:22:49,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:22:49,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:22:49,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:22:49,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:22:49,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:22:49,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:22:49,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:22:49,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:22:49,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:22:49,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:22:49,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:22:49,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:22:49,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:22:49,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:22:49,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:22:49,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:22:49,540 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:22:49,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:22:49,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:22:49,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:22:49,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:22:49,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:22:49,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:22:49,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:22:49,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:22:49,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:22:49,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:22:49,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:22:49,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:22:49,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:22:49,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:22:49,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:22:49,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:22:49,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:22:49,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:22:49,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:22:49,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:22:49,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:22:49,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:22:49,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:22:49,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:22:49,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:22:49,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:22:50,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:22:50,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:22:50,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:22:50,009 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:22:50,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2020-10-27 20:22:50,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ac566bde/1232025860174f6aa197bcf559886ade/FLAG90035710d [2020-10-27 20:22:50,769 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:22:50,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/compact.c [2020-10-27 20:22:50,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ac566bde/1232025860174f6aa197bcf559886ade/FLAG90035710d [2020-10-27 20:22:51,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ac566bde/1232025860174f6aa197bcf559886ade [2020-10-27 20:22:51,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:22:51,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:22:51,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:22:51,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:22:51,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:22:51,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63360f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51, skipping insertion in model container [2020-10-27 20:22:51,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:22:51,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:22:51,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:22:51,404 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:22:51,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:22:51,440 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:22:51,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51 WrapperNode [2020-10-27 20:22:51,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:22:51,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:22:51,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:22:51,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:22:51,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:22:51,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:22:51,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:22:51,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:22:51,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:22:51,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:22:51,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:22:51,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:22:51,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:22:51,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:22:51,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:22:51,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:22:51,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:22:51,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 20:22:51,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:22:51,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:22:51,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:22:51,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:22:51,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:22:51,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:22:51,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:22:52,001 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:22:52,002 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:22:52,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:22:52 BoogieIcfgContainer [2020-10-27 20:22:52,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:22:52,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:22:52,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:22:52,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:22:52,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:22:51" (1/3) ... [2020-10-27 20:22:52,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4144ee14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:22:52, skipping insertion in model container [2020-10-27 20:22:52,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (2/3) ... [2020-10-27 20:22:52,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4144ee14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:22:52, skipping insertion in model container [2020-10-27 20:22:52,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:22:52" (3/3) ... [2020-10-27 20:22:52,015 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2020-10-27 20:22:52,029 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:22:52,034 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:22:52,051 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:22:52,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:22:52,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:22:52,082 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:22:52,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:22:52,082 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:22:52,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:22:52,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:22:52,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:22:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:22:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 20:22:52,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:52,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:52,110 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1845562233, now seen corresponding path program 1 times [2020-10-27 20:22:52,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:52,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532950248] [2020-10-27 20:22:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:52,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:22:52,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:22:52,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 20:22:52,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:22:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:52,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:22:52,651 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-27 20:22:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:52,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:52,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:52,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 20:22:52,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:52,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:52,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:22:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:52,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532950248] [2020-10-27 20:22:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:22:52,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:22:52,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678240802] [2020-10-27 20:22:52,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:22:52,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:22:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:22:52,786 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 20:22:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:52,934 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-27 20:22:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:22:52,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-27 20:22:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:52,953 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:22:52,954 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:22:52,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:22:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:22:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-10-27 20:22:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:22:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 20:22:53,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-10-27 20:22:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:53,022 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 20:22:53,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:22:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 20:22:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 20:22:53,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:53,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:53,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:22:53,026 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:53,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1840011497, now seen corresponding path program 1 times [2020-10-27 20:22:53,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:53,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752184541] [2020-10-27 20:22:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:53,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:22:53,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:22:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-27 20:22:53,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:22:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:22:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:22:53,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:22:53,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:53,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:53,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:53,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:22:53,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:53,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752184541] [2020-10-27 20:22:53,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:22:53,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:22:53,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217484375] [2020-10-27 20:22:53,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:22:53,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:22:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:22:53,431 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 20:22:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:53,548 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 20:22:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:22:53,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-27 20:22:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:53,550 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:22:53,550 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:22:53,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:22:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:22:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-27 20:22:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:22:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:22:53,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2020-10-27 20:22:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:53,560 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:22:53,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:22:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:22:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:22:53,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:53,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:53,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:22:53,562 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash -373684397, now seen corresponding path program 1 times [2020-10-27 20:22:53,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:53,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140508756] [2020-10-27 20:22:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:53,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:54,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:22:54,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:22:54,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-27 20:22:54,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:22:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:22:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:22:54,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:22:54,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:54,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:54,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:54,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:54,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:22:54,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:54,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:54,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:22:54,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140508756] [2020-10-27 20:22:54,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:54,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:22:54,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028286155] [2020-10-27 20:22:54,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:22:54,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:54,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:22:54,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:22:54,361 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 20:22:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:54,473 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-27 20:22:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:22:54,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 20:22:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:54,475 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:22:54,475 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:22:54,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:22:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:22:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-27 20:22:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:22:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 20:22:54,483 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-27 20:22:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:54,484 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 20:22:54,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:22:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 20:22:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:22:54,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:54,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:54,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:22:54,486 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2072037349, now seen corresponding path program 2 times [2020-10-27 20:22:54,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:54,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007715645] [2020-10-27 20:22:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:55,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:22:55,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:22:55,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-27 20:22:55,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:55,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:22:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:22:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:22:55,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:55,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:55,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:55,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:55,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:22:55,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:55,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:55,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:55,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:55,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:22:55,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007715645] [2020-10-27 20:22:55,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:55,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:22:55,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969388065] [2020-10-27 20:22:55,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:22:55,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:22:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:22:55,601 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-27 20:22:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:55,796 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-27 20:22:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:22:55,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 20:22:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:55,797 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:22:55,798 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:22:55,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:22:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:22:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 20:22:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:22:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 20:22:55,806 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-27 20:22:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:55,806 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 20:22:55,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:22:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 20:22:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:22:55,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:55,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:55,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:22:55,808 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash -767325097, now seen corresponding path program 3 times [2020-10-27 20:22:55,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:55,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911278347] [2020-10-27 20:22:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:55,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:57,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:22:57,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:22:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1839 [2020-10-27 20:22:57,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:22:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:22:57,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:22:57,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:57,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:57,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:57,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:57,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:57,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:22:57,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:57,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:22:57,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911278347] [2020-10-27 20:22:57,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:57,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:22:57,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011170518] [2020-10-27 20:22:57,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:22:57,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:22:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:22:57,839 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-10-27 20:22:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:58,009 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-27 20:22:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:22:58,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 20:22:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:58,013 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:22:58,013 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:22:58,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:22:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:22:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-27 20:22:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:22:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 20:22:58,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-27 20:22:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:58,027 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 20:22:58,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:22:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 20:22:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:22:58,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:58,028 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:58,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:22:58,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1033879839, now seen corresponding path program 4 times [2020-10-27 20:22:58,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:58,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120036380] [2020-10-27 20:22:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:58,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:58,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:01,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:01,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:23:01,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:01,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3628 [2020-10-27 20:23:01,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:23:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:23:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:23:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:01,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:01,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:01,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:23:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:23:01,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120036380] [2020-10-27 20:23:01,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:01,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:23:01,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136950568] [2020-10-27 20:23:01,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:23:01,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:23:01,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:23:01,854 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2020-10-27 20:23:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:02,062 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-27 20:23:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:23:02,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 20:23:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:02,064 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:23:02,064 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:23:02,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:23:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 20:23:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:23:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 20:23:02,079 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-27 20:23:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:02,082 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 20:23:02,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:23:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 20:23:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:23:02,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:02,084 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:02,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:23:02,084 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1765026139, now seen corresponding path program 5 times [2020-10-27 20:23:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:02,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118737405] [2020-10-27 20:23:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:07,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:07,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:23:07,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:07,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:23:07,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:23:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:23:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:23:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:07,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:07,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:07,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:07,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:07,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:07,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:07,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:07,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:07,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:07,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 20:23:07,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118737405] [2020-10-27 20:23:07,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:07,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:23:07,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330196648] [2020-10-27 20:23:07,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:23:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:23:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:07,312 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-27 20:23:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:07,614 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-27 20:23:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:23:07,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 20:23:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:07,616 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:23:07,616 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:23:07,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:23:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:23:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 20:23:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:23:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 20:23:07,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-27 20:23:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:07,635 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 20:23:07,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:23:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 20:23:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:23:07,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:07,637 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:07,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:23:07,637 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2061074979, now seen corresponding path program 6 times [2020-10-27 20:23:07,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:07,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355828661] [2020-10-27 20:23:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:07,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:12,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:12,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:23:12,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:12,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 20:23:12,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:12,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:23:12,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:23:12,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:23:12,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:12,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:12,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:12,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:12,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:12,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:12,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:12,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:12,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:23:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355828661] [2020-10-27 20:23:12,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:12,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:23:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002645266] [2020-10-27 20:23:12,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:23:12,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:23:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:23:12,932 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 10 states. [2020-10-27 20:23:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:13,226 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-10-27 20:23:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:23:13,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 20:23:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:13,227 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:23:13,228 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:23:13,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:23:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 20:23:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:23:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 20:23:13,243 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-27 20:23:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:13,243 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 20:23:13,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:23:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 20:23:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:23:13,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:13,251 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:13,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:23:13,252 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 414195295, now seen corresponding path program 7 times [2020-10-27 20:23:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:13,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535596765] [2020-10-27 20:23:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:14,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:18,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:23:18,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:23:18,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:23:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:23:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:23:18,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:18,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:18,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:18,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:18,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:23:18,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:18,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 20:23:18,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535596765] [2020-10-27 20:23:18,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:18,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:23:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202527263] [2020-10-27 20:23:18,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:23:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:23:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:18,516 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 11 states. [2020-10-27 20:23:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:18,817 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 20:23:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:23:18,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 20:23:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:18,820 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:23:18,821 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:23:18,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:23:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:23:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 20:23:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:23:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-27 20:23:18,835 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-27 20:23:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:18,835 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-27 20:23:18,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:23:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-27 20:23:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:23:18,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:18,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:18,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:23:18,840 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1951447847, now seen corresponding path program 8 times [2020-10-27 20:23:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:18,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887609654] [2020-10-27 20:23:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:18,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:23,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:23,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:23:23,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:23,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 20:23:23,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:23:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:23:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:23:23,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:23:24,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:24,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:24,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:24,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:24,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:24,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:24,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:23:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 20:23:24,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887609654] [2020-10-27 20:23:24,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:24,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:23:24,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782212075] [2020-10-27 20:23:24,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:23:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:23:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:23:24,180 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 12 states. [2020-10-27 20:23:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:24,589 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-27 20:23:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:23:24,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 20:23:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:24,591 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:23:24,591 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 20:23:24,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:23:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 20:23:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 20:23:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:23:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 20:23:24,607 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-27 20:23:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:24,608 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 20:23:24,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:23:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 20:23:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:23:24,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:24,613 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:24,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:23:24,614 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash 131836771, now seen corresponding path program 9 times [2020-10-27 20:23:24,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:24,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229131330] [2020-10-27 20:23:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:24,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:26,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:29,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:29,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:23:29,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:29,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-27 20:23:29,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:23:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 20:23:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:23:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:30,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:30,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:30,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:30,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:30,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:30,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:30,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:30,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:30,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 20:23:30,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229131330] [2020-10-27 20:23:30,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:30,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:23:30,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67751079] [2020-10-27 20:23:30,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:23:30,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:23:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:23:30,042 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 13 states. [2020-10-27 20:23:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:30,585 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-27 20:23:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:23:30,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-27 20:23:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:30,587 INFO L225 Difference]: With dead ends: 97 [2020-10-27 20:23:30,587 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:23:30,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:23:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:23:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-27 20:23:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:23:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-27 20:23:30,597 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-27 20:23:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:30,597 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-27 20:23:30,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:23:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-27 20:23:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:23:30,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:30,598 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:30,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:23:30,599 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1630121003, now seen corresponding path program 10 times [2020-10-27 20:23:30,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:30,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699112854] [2020-10-27 20:23:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:35,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:35,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:23:35,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:35,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:35,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:35,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:35,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:35,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:35,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:35,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 20:23:35,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699112854] [2020-10-27 20:23:35,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:35,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:23:35,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732958216] [2020-10-27 20:23:35,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:23:35,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:35,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:23:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:23:35,953 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 14 states. [2020-10-27 20:23:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:36,567 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-27 20:23:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:23:36,568 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-27 20:23:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:36,569 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:23:36,569 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:23:36,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:23:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:23:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 20:23:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:23:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 20:23:36,580 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-27 20:23:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:36,580 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 20:23:36,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:23:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 20:23:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:23:36,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:36,582 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:36,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:23:36,582 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1629810585, now seen corresponding path program 11 times [2020-10-27 20:23:36,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:36,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390137628] [2020-10-27 20:23:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:41,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:41,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:23:41,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:41,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-27 20:23:41,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:23:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:23:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:23:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:42,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:42,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:42,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:42,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:42,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:42,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:23:42,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:42,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:42,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:42,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:42,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 20:23:42,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390137628] [2020-10-27 20:23:42,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:42,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:23:42,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619411795] [2020-10-27 20:23:42,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:23:42,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:23:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:23:42,067 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 15 states. [2020-10-27 20:23:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:42,680 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-10-27 20:23:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:23:42,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-27 20:23:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:42,682 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:23:42,682 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:23:42,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:23:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:23:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 20:23:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:23:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-27 20:23:42,702 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-27 20:23:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:42,703 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-27 20:23:42,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:23:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-27 20:23:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:23:42,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:42,704 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:42,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:23:42,704 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 74934993, now seen corresponding path program 12 times [2020-10-27 20:23:42,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:42,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245710993] [2020-10-27 20:23:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:48,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:23:48,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-27 20:23:48,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:23:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 20:23:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:23:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:48,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:48,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:48,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:48,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:48,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:48,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 20:23:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245710993] [2020-10-27 20:23:48,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:48,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:23:48,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443982564] [2020-10-27 20:23:48,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:23:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:23:48,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:23:48,422 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 16 states. [2020-10-27 20:23:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:49,260 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-27 20:23:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:23:49,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-27 20:23:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:49,262 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:23:49,262 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:23:49,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:23:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:23:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-27 20:23:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:23:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 20:23:49,282 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-27 20:23:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:49,282 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 20:23:49,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:23:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 20:23:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:23:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:49,283 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:49,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:23:49,283 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 181570923, now seen corresponding path program 13 times [2020-10-27 20:23:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:49,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177792776] [2020-10-27 20:23:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:49,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:23:54,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 20:23:54,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:23:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 20:23:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:23:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:54,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:54,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:54,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:54,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 20:23:54,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177792776] [2020-10-27 20:23:54,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:54,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:23:54,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442385715] [2020-10-27 20:23:54,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:23:54,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:23:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:23:54,731 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 17 states. [2020-10-27 20:23:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:55,478 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-27 20:23:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:23:55,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-27 20:23:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:55,480 INFO L225 Difference]: With dead ends: 129 [2020-10-27 20:23:55,480 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:23:55,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:23:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:23:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-27 20:23:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:23:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-27 20:23:55,489 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-27 20:23:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:55,489 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-27 20:23:55,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:23:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-27 20:23:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:23:55,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:55,490 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:55,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:23:55,491 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash -76658227, now seen corresponding path program 14 times [2020-10-27 20:23:55,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:55,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104733782] [2020-10-27 20:23:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:55,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:24:00,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:00,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:00,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:00,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:00,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:00,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:00,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:00,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-27 20:24:00,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104733782] [2020-10-27 20:24:00,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:00,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:24:00,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676733678] [2020-10-27 20:24:00,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:24:00,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:24:00,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:24:00,940 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 18 states. [2020-10-27 20:24:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:01,838 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2020-10-27 20:24:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:24:01,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-27 20:24:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:01,840 INFO L225 Difference]: With dead ends: 137 [2020-10-27 20:24:01,840 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:24:01,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:24:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:24:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-27 20:24:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 20:24:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 20:24:01,860 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-27 20:24:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:01,860 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 20:24:01,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:24:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 20:24:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:24:01,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:01,865 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:01,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:24:01,865 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1041866129, now seen corresponding path program 15 times [2020-10-27 20:24:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:01,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399811946] [2020-10-27 20:24:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5670 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:24:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:07,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:07,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:07,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 20:24:08,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399811946] [2020-10-27 20:24:08,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:08,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:24:08,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111931992] [2020-10-27 20:24:08,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:24:08,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:24:08,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:24:08,023 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-10-27 20:24:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:09,002 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2020-10-27 20:24:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:24:09,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-10-27 20:24:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:09,003 INFO L225 Difference]: With dead ends: 145 [2020-10-27 20:24:09,004 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:24:09,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:24:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:24:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-27 20:24:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:24:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-27 20:24:09,018 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2020-10-27 20:24:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:09,018 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-27 20:24:09,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:24:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-27 20:24:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:24:09,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:09,020 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:09,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:24:09,020 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:09,021 INFO L82 PathProgramCache]: Analyzing trace with hash 932622537, now seen corresponding path program 16 times [2020-10-27 20:24:09,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:09,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761518938] [2020-10-27 20:24:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:09,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5419 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:24:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:14,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:14,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:14,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:14,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:14,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:14,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:14,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-27 20:24:14,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761518938] [2020-10-27 20:24:14,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:14,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:24:14,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872666498] [2020-10-27 20:24:14,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:24:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:24:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:24:14,985 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 20 states. [2020-10-27 20:24:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:16,137 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-27 20:24:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:24:16,138 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-10-27 20:24:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:16,140 INFO L225 Difference]: With dead ends: 153 [2020-10-27 20:24:16,140 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:24:16,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:24:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:24:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-27 20:24:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:24:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 20:24:16,149 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 91 [2020-10-27 20:24:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:16,150 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 20:24:16,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:24:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 20:24:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 20:24:16,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:16,151 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:16,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:24:16,151 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 121294707, now seen corresponding path program 17 times [2020-10-27 20:24:16,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:16,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436078620] [2020-10-27 20:24:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:16,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:21,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 20:24:21,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:21,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5206 [2020-10-27 20:24:21,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:24:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:24:21,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:21,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:21,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-27 20:24:21,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436078620] [2020-10-27 20:24:21,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:21,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:24:21,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004820414] [2020-10-27 20:24:21,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:24:21,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:24:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:24:21,893 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 21 states. [2020-10-27 20:24:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:23,104 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-10-27 20:24:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:24:23,105 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-10-27 20:24:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:23,106 INFO L225 Difference]: With dead ends: 161 [2020-10-27 20:24:23,107 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:24:23,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:24:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:24:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-27 20:24:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:24:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-27 20:24:23,115 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-27 20:24:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:23,115 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-27 20:24:23,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:24:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-27 20:24:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:24:23,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:23,117 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:23,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:24:23,117 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1573674949, now seen corresponding path program 18 times [2020-10-27 20:24:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:23,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611845160] [2020-10-27 20:24:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:28,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:28,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:24:28,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:28,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-27 20:24:28,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:24:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:24:28,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-27 20:24:28,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611845160] [2020-10-27 20:24:28,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:28,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:24:28,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458533398] [2020-10-27 20:24:28,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:24:28,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:28,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:24:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:24:28,764 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2020-10-27 20:24:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:30,107 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-10-27 20:24:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:24:30,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-10-27 20:24:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:30,110 INFO L225 Difference]: With dead ends: 169 [2020-10-27 20:24:30,110 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 20:24:30,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:24:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 20:24:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-27 20:24:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:24:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 20:24:30,119 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-27 20:24:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:30,120 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 20:24:30,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:24:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 20:24:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 20:24:30,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:30,121 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:30,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:24:30,122 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1861489783, now seen corresponding path program 19 times [2020-10-27 20:24:30,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:30,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437176295] [2020-10-27 20:24:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:35,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:35,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 20:24:35,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-27 20:24:35,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:24:35,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:35,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:24:35,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:35,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:35,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:35,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:35,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:35,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-27 20:24:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437176295] [2020-10-27 20:24:35,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:35,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:24:35,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808774575] [2020-10-27 20:24:35,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:24:35,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:24:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:24:35,834 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 23 states. [2020-10-27 20:24:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:37,325 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-27 20:24:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:24:37,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-27 20:24:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:37,327 INFO L225 Difference]: With dead ends: 177 [2020-10-27 20:24:37,327 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:24:37,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:24:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:24:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-27 20:24:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:24:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-27 20:24:37,336 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-10-27 20:24:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:37,336 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-27 20:24:37,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:24:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-27 20:24:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:24:37,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:37,338 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:37,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:24:37,338 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2146113217, now seen corresponding path program 20 times [2020-10-27 20:24:37,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:37,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342372244] [2020-10-27 20:24:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:37,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:43,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6027 [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:24:43,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:44,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:44,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:44,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:44,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-27 20:24:44,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342372244] [2020-10-27 20:24:44,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:44,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:24:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060388946] [2020-10-27 20:24:44,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:24:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:24:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:24:44,041 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 24 states. [2020-10-27 20:24:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:45,592 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2020-10-27 20:24:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:24:45,595 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-27 20:24:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:45,596 INFO L225 Difference]: With dead ends: 185 [2020-10-27 20:24:45,597 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 20:24:45,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:24:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 20:24:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-27 20:24:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:24:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-27 20:24:45,606 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2020-10-27 20:24:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:45,606 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-27 20:24:45,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:24:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-27 20:24:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 20:24:45,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:45,608 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:45,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:24:45,608 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1647735163, now seen corresponding path program 21 times [2020-10-27 20:24:45,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:45,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229791604] [2020-10-27 20:24:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:50,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:50,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 20:24:50,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:50,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-27 20:24:50,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:50,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:24:50,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:50,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:24:50,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:51,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:51,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:51,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-27 20:24:51,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229791604] [2020-10-27 20:24:51,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:51,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:24:51,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312668165] [2020-10-27 20:24:51,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:24:51,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:51,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:24:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:24:51,489 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 25 states. [2020-10-27 20:24:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:53,193 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2020-10-27 20:24:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:24:53,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-10-27 20:24:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:53,196 INFO L225 Difference]: With dead ends: 193 [2020-10-27 20:24:53,196 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:24:53,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:24:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:24:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-27 20:24:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:24:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-27 20:24:53,205 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-10-27 20:24:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:53,205 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-27 20:24:53,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:24:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-27 20:24:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 20:24:53,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:53,206 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:53,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:24:53,207 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:53,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1731291715, now seen corresponding path program 22 times [2020-10-27 20:24:53,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:53,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833467119] [2020-10-27 20:24:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:58,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:58,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:24:58,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5343 [2020-10-27 20:24:58,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:24:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:24:58,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:59,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:59,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:59,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:59,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:59,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:59,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:59,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:59,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-27 20:24:59,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833467119] [2020-10-27 20:24:59,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:59,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:24:59,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570025970] [2020-10-27 20:24:59,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:24:59,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:24:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:24:59,314 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 26 states. [2020-10-27 20:25:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:01,242 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-27 20:25:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:25:01,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-10-27 20:25:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:01,244 INFO L225 Difference]: With dead ends: 201 [2020-10-27 20:25:01,244 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 20:25:01,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:25:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 20:25:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-27 20:25:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 20:25:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-27 20:25:01,253 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-27 20:25:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:01,254 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-27 20:25:01,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:25:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-27 20:25:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 20:25:01,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:01,255 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:01,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:25:01,256 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1557780865, now seen corresponding path program 23 times [2020-10-27 20:25:01,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:01,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453812724] [2020-10-27 20:25:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7237 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:25:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:09,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:09,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:09,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:09,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:09,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:09,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:09,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:09,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:09,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-27 20:25:09,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453812724] [2020-10-27 20:25:09,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:09,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:25:09,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925733722] [2020-10-27 20:25:09,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:25:09,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:25:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:25:09,270 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 27 states. [2020-10-27 20:25:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:11,268 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2020-10-27 20:25:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:25:11,269 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-10-27 20:25:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:11,270 INFO L225 Difference]: With dead ends: 209 [2020-10-27 20:25:11,271 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 20:25:11,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:25:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 20:25:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-27 20:25:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 20:25:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-10-27 20:25:11,282 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 126 [2020-10-27 20:25:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:11,283 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-10-27 20:25:11,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:25:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-10-27 20:25:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 20:25:11,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:11,284 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:11,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:25:11,285 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash 139631801, now seen corresponding path program 24 times [2020-10-27 20:25:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:11,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063499897] [2020-10-27 20:25:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6695 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:25:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:18,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:18,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:18,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-27 20:25:18,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063499897] [2020-10-27 20:25:18,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:18,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:25:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981931890] [2020-10-27 20:25:18,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:25:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:25:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:25:18,814 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 28 states. [2020-10-27 20:25:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:21,003 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2020-10-27 20:25:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:25:21,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-10-27 20:25:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:21,005 INFO L225 Difference]: With dead ends: 217 [2020-10-27 20:25:21,005 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 20:25:21,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:25:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 20:25:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-27 20:25:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 20:25:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-27 20:25:21,014 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 131 [2020-10-27 20:25:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:21,014 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-27 20:25:21,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:25:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-27 20:25:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 20:25:21,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:21,015 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:21,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:25:21,016 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash -790137981, now seen corresponding path program 25 times [2020-10-27 20:25:21,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:21,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538571460] [2020-10-27 20:25:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:27,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:27,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 20:25:27,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6451 [2020-10-27 20:25:27,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:25:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 20:25:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 20:25:27,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:28,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:28,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:28,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 20:25:28,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538571460] [2020-10-27 20:25:28,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:28,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:25:28,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547489482] [2020-10-27 20:25:28,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:25:28,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:25:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:25:28,419 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 29 states. [2020-10-27 20:25:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:30,858 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-27 20:25:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:25:30,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-10-27 20:25:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:30,860 INFO L225 Difference]: With dead ends: 225 [2020-10-27 20:25:30,860 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 20:25:30,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:25:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 20:25:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-27 20:25:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 20:25:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-27 20:25:30,869 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-10-27 20:25:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:30,869 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-27 20:25:30,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:25:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-27 20:25:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 20:25:30,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:30,871 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:30,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:25:30,871 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash 257092533, now seen corresponding path program 26 times [2020-10-27 20:25:30,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:30,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060973962] [2020-10-27 20:25:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:31,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:40,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:40,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 20:25:40,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:40,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9502 [2020-10-27 20:25:40,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:40,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:25:40,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 20:25:40,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:25:40,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:41,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:41,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:41,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:41,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:41,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:41,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:41,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 20:25:41,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060973962] [2020-10-27 20:25:41,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:41,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:25:41,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386008111] [2020-10-27 20:25:41,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:25:41,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:41,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:25:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:25:41,357 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 30 states. [2020-10-27 20:25:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:43,978 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2020-10-27 20:25:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:25:43,979 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-10-27 20:25:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:43,980 INFO L225 Difference]: With dead ends: 233 [2020-10-27 20:25:43,981 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 20:25:43,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:25:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 20:25:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-27 20:25:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 20:25:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-27 20:25:43,990 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 141 [2020-10-27 20:25:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:43,990 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-27 20:25:43,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:25:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-27 20:25:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 20:25:43,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:43,993 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:43,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:25:43,993 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash -341927801, now seen corresponding path program 27 times [2020-10-27 20:25:43,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:43,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410985956] [2020-10-27 20:25:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:44,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9992 [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:25:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:55,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:55,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:55,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:55,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:55,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:55,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:25:55,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:55,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:55,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:55,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:55,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-27 20:25:55,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410985956] [2020-10-27 20:25:55,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:55,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:25:55,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465518071] [2020-10-27 20:25:55,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:25:55,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:55,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:25:55,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:25:55,056 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 31 states. [2020-10-27 20:25:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:57,788 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2020-10-27 20:25:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:25:57,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-10-27 20:25:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:57,790 INFO L225 Difference]: With dead ends: 241 [2020-10-27 20:25:57,790 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 20:25:57,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:25:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 20:25:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-27 20:25:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 20:25:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-27 20:25:57,801 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 146 [2020-10-27 20:25:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:57,801 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-27 20:25:57,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:25:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-27 20:25:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 20:25:57,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:57,802 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:57,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:25:57,803 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1269514929, now seen corresponding path program 28 times [2020-10-27 20:25:57,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:57,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029391691] [2020-10-27 20:25:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:57,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:09,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:09,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 20:26:09,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11223 [2020-10-27 20:26:09,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:09,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:26:09,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:09,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:26:09,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:10,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:10,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:10,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:10,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:10,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-27 20:26:10,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029391691] [2020-10-27 20:26:10,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:10,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:26:10,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794188836] [2020-10-27 20:26:10,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:26:10,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:10,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:26:10,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:26:10,094 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 32 states. [2020-10-27 20:26:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:12,972 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-27 20:26:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:26:12,973 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-10-27 20:26:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:12,975 INFO L225 Difference]: With dead ends: 249 [2020-10-27 20:26:12,975 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 20:26:12,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:26:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 20:26:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-27 20:26:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:26:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-27 20:26:12,985 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2020-10-27 20:26:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:12,985 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-27 20:26:12,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:26:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-27 20:26:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 20:26:12,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:12,987 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:12,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:26:12,987 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash -663759477, now seen corresponding path program 29 times [2020-10-27 20:26:12,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:12,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900733469] [2020-10-27 20:26:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8900 [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:26:21,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:22,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:22,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:22,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:22,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:22,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:22,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:22,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:22,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-27 20:26:23,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900733469] [2020-10-27 20:26:23,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:23,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:26:23,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816074427] [2020-10-27 20:26:23,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:26:23,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:26:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:26:23,007 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 33 states. [2020-10-27 20:26:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:26,105 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2020-10-27 20:26:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:26:26,106 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-10-27 20:26:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:26,108 INFO L225 Difference]: With dead ends: 257 [2020-10-27 20:26:26,108 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 20:26:26,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:26:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 20:26:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-27 20:26:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 20:26:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-27 20:26:26,118 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-10-27 20:26:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:26,118 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-27 20:26:26,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:26:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-27 20:26:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 20:26:26,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:26,119 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:26,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:26:26,122 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:26,125 INFO L82 PathProgramCache]: Analyzing trace with hash 876044717, now seen corresponding path program 30 times [2020-10-27 20:26:26,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:26,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514343365] [2020-10-27 20:26:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:37,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:37,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11127 [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:26:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:38,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:38,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:38,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-27 20:26:38,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514343365] [2020-10-27 20:26:38,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:38,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:26:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474175877] [2020-10-27 20:26:38,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:26:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:26:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:26:38,479 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 34 states. [2020-10-27 20:26:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:41,734 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2020-10-27 20:26:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:26:41,735 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2020-10-27 20:26:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:41,736 INFO L225 Difference]: With dead ends: 265 [2020-10-27 20:26:41,736 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 20:26:41,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:26:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 20:26:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-27 20:26:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 20:26:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-27 20:26:41,747 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 161 [2020-10-27 20:26:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:41,748 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-27 20:26:41,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:26:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-27 20:26:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 20:26:41,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:41,749 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:41,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:26:41,749 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -444634481, now seen corresponding path program 31 times [2020-10-27 20:26:41,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:41,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246119678] [2020-10-27 20:26:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking...