/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/res1o.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:54:38,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:54:38,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:54:38,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:54:38,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:54:38,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:54:38,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:54:38,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:54:38,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:54:38,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:54:38,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:54:38,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:54:38,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:54:38,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:54:38,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:54:38,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:54:38,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:54:38,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:54:38,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:54:38,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:54:38,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:54:38,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:54:38,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:54:38,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:54:38,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:54:38,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:54:38,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:54:38,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:54:38,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:54:38,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:54:38,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:54:38,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:54:38,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:54:38,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:54:38,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:54:38,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:54:38,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:54:38,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:54:38,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:54:38,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:54:38,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:54:38,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:54:38,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:54:38,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:54:38,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:54:38,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:54:38,620 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:54:38,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:54:38,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:54:38,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:54:38,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:54:38,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:54:38,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:54:38,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:54:38,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:54:38,623 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:54:38,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:54:38,623 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:54:38,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:54:38,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:54:38,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:54:38,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:54:38,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:54:38,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:54:38,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:54:38,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:54:38,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:54:38,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:54:38,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:54:38,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:54:38,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:54:38,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:54:39,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:54:39,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:54:39,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:54:39,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:54:39,068 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:54:39,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1o.c [2020-10-29 03:54:39,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36e8ce04b/528b548019d04d1ab52d9a927c8b9384/FLAG5ea671ee8 [2020-10-29 03:54:39,703 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:54:39,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1o.c [2020-10-29 03:54:39,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36e8ce04b/528b548019d04d1ab52d9a927c8b9384/FLAG5ea671ee8 [2020-10-29 03:54:40,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36e8ce04b/528b548019d04d1ab52d9a927c8b9384 [2020-10-29 03:54:40,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:54:40,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:54:40,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:54:40,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:54:40,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:54:40,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e715125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40, skipping insertion in model container [2020-10-29 03:54:40,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:54:40,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:54:40,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:54:40,311 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:54:40,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:54:40,354 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:54:40,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40 WrapperNode [2020-10-29 03:54:40,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:54:40,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:54:40,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:54:40,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:54:40,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... [2020-10-29 03:54:40,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:54:40,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:54:40,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:54:40,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:54:40,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:54:40,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:54:40,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:54:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:54:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:54:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:54:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:54:40,529 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:54:40,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:54:40,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:54:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:54:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:54:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:54:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:54:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:54:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:54:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:54:40,891 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:54:40,891 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 03:54:40,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:54:40 BoogieIcfgContainer [2020-10-29 03:54:40,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:54:40,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:54:40,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:54:40,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:54:40,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:54:40" (1/3) ... [2020-10-29 03:54:40,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fe367c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:54:40, skipping insertion in model container [2020-10-29 03:54:40,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:40" (2/3) ... [2020-10-29 03:54:40,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fe367c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:54:40, skipping insertion in model container [2020-10-29 03:54:40,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:54:40" (3/3) ... [2020-10-29 03:54:40,902 INFO L111 eAbstractionObserver]: Analyzing ICFG res1o.c [2020-10-29 03:54:40,913 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:54:40,918 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:54:40,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:54:40,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:54:40,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:54:40,963 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:54:40,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:54:40,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:54:40,963 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:54:40,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:54:40,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:54:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-29 03:54:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 03:54:40,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:40,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:40,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash -181434534, now seen corresponding path program 1 times [2020-10-29 03:54:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:41,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641973205] [2020-10-29 03:54:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:42,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:43,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 03:54:43,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:54:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2629 [2020-10-29 03:54:43,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:43,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:54:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:54:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 03:54:43,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:54:43,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:43,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:43,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:43,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:43,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:54:43,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:43,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:43,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:43,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:43,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:43,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:54:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:54:43,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:43,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:43,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:43,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:44,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641973205] [2020-10-29 03:54:44,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:54:44,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:54:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794383655] [2020-10-29 03:54:44,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:54:44,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:54:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:54:44,033 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 5 states. [2020-10-29 03:54:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:44,379 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2020-10-29 03:54:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:54:44,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-29 03:54:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:44,390 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:54:44,391 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:54:44,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:54:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:54:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 03:54:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 03:54:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-29 03:54:44,457 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-29 03:54:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:44,457 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-29 03:54:44,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:54:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-29 03:54:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:54:44,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:44,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:44,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:54:44,462 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -697842092, now seen corresponding path program 1 times [2020-10-29 03:54:44,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:44,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276281193] [2020-10-29 03:54:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:44,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:45,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:47,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:47,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:49,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:49,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:49,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:54:49,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:54:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:54:49,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:49,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:54:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:54:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:50,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:50,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:50,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:50,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:50,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:54:50,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:50,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:50,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:50,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:50,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:50,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:50,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:50,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:50,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:50,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:50,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:50,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:50,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:50,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276281193] [2020-10-29 03:54:50,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:50,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:54:50,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140819310] [2020-10-29 03:54:50,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:54:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:54:50,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:54:50,073 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 14 states. [2020-10-29 03:54:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:50,791 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-29 03:54:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:54:50,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-29 03:54:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:50,793 INFO L225 Difference]: With dead ends: 57 [2020-10-29 03:54:50,793 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 03:54:50,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:54:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 03:54:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-29 03:54:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:54:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-29 03:54:50,805 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2020-10-29 03:54:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:50,806 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-29 03:54:50,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:54:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-29 03:54:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 03:54:50,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:50,808 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:50,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:54:50,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash 583184370, now seen corresponding path program 2 times [2020-10-29 03:54:50,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:50,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660490970] [2020-10-29 03:54:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:50,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:53,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 03:54:53,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:54:53,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-29 03:54:53,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:53,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:53,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:54:53,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 03:54:53,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:54:53,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:53,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:53,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:53,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:53,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:53,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:54:53,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:53,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:53,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:53,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:53,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:53,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:53,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:53,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:53,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:53,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:53,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:53,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:53,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:54:53,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660490970] [2020-10-29 03:54:53,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:53,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:54:53,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885012051] [2020-10-29 03:54:53,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:54:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:54:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:54:53,211 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 8 states. [2020-10-29 03:54:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:53,479 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-29 03:54:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:54:53,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-29 03:54:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:53,481 INFO L225 Difference]: With dead ends: 96 [2020-10-29 03:54:53,481 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:54:53,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:54:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:54:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-29 03:54:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:54:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-29 03:54:53,493 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2020-10-29 03:54:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:53,494 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-29 03:54:53,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:54:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-29 03:54:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 03:54:53,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:53,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:53,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:54:53,496 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1529483086, now seen corresponding path program 3 times [2020-10-29 03:54:53,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:53,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926348101] [2020-10-29 03:54:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:54,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:56,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:58,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 03:54:58,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:54:58,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:54:58,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:58,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:54:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:54:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:58,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:58,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:58,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:58,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:58,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:58,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:58,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:58,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:58,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:58,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:58,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:58,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:58,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:58,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:54:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926348101] [2020-10-29 03:54:58,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:58,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:54:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211609468] [2020-10-29 03:54:58,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:54:58,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:58,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:54:58,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:54:58,640 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 8 states. [2020-10-29 03:54:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:58,902 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-29 03:54:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:54:58,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-29 03:54:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:58,904 INFO L225 Difference]: With dead ends: 58 [2020-10-29 03:54:58,904 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 03:54:58,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:54:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 03:54:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 03:54:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:54:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-29 03:54:58,919 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-10-29 03:54:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:58,919 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-29 03:54:58,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:54:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-29 03:54:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 03:54:58,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:58,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:58,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:54:58,923 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1178128052, now seen corresponding path program 4 times [2020-10-29 03:54:58,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:58,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757935931] [2020-10-29 03:54:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:58,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:01,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:01,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:02,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:03,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 03:55:03,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:55:03,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:55:03,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:03,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:03,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:55:03,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:03,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:55:03,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:05,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:05,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:05,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:05,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:05,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:05,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:05,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:05,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:05,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:05,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:05,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:05,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:05,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:05,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:05,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:05,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:05,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:05,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757935931] [2020-10-29 03:55:05,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:05,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:55:05,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732178884] [2020-10-29 03:55:05,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:55:05,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:55:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:55:05,095 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 22 states. [2020-10-29 03:55:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:06,504 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-29 03:55:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:55:06,505 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-29 03:55:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:06,506 INFO L225 Difference]: With dead ends: 66 [2020-10-29 03:55:06,506 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:55:06,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:55:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:55:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-29 03:55:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:55:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-29 03:55:06,528 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 42 [2020-10-29 03:55:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:06,530 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-29 03:55:06,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:55:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-29 03:55:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 03:55:06,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:06,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:06,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:55:06,532 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1410122518, now seen corresponding path program 5 times [2020-10-29 03:55:06,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:06,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106470240] [2020-10-29 03:55:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:06,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:06,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 03:55:11,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:55:11,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:55:11,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:55:11,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:11,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:55:11,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:11,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:11,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:11,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:11,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:11,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:11,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:11,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:11,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:55:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106470240] [2020-10-29 03:55:11,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:11,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:55:11,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112070556] [2020-10-29 03:55:11,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:55:11,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:55:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:55:11,674 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 10 states. [2020-10-29 03:55:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:12,008 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2020-10-29 03:55:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:55:12,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-29 03:55:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:12,010 INFO L225 Difference]: With dead ends: 112 [2020-10-29 03:55:12,010 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 03:55:12,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:55:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 03:55:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-29 03:55:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 03:55:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-29 03:55:12,021 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2020-10-29 03:55:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:12,022 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-29 03:55:12,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:55:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-29 03:55:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:55:12,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:12,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:12,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:55:12,023 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash -476120504, now seen corresponding path program 6 times [2020-10-29 03:55:12,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:12,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188513971] [2020-10-29 03:55:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:12,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:15,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:15,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:17,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:17,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:55:17,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:55:17,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:17,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:17,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:17,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:17,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:17,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:17,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:17,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:17,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:17,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:17,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:17,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:17,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:17,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:17,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-29 03:55:17,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188513971] [2020-10-29 03:55:17,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:17,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:55:17,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650426324] [2020-10-29 03:55:17,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:55:17,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:17,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:55:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:55:17,168 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 10 states. [2020-10-29 03:55:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:17,538 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-29 03:55:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:55:17,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-29 03:55:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:17,540 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:55:17,540 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:55:17,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:55:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:55:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 03:55:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 03:55:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-29 03:55:17,558 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2020-10-29 03:55:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:17,559 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-29 03:55:17,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:55:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-29 03:55:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 03:55:17,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:17,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:17,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:55:17,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -460749756, now seen corresponding path program 7 times [2020-10-29 03:55:17,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:17,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897390974] [2020-10-29 03:55:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:17,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:19,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:21,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:22,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 03:55:22,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:55:22,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:55:22,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:22,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:55:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:55:22,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:25,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:25,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:25,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:25,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:25,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:55:25,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:25,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:25,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:25,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:25,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:25,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:25,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:25,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:25,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897390974] [2020-10-29 03:55:25,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:25,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:55:25,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718440890] [2020-10-29 03:55:25,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:55:25,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:25,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:55:25,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:55:25,094 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 32 states. [2020-10-29 03:55:25,485 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-29 03:55:25,809 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-29 03:55:25,982 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-29 03:55:26,630 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2020-10-29 03:55:26,874 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2020-10-29 03:55:27,080 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-29 03:55:27,427 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-29 03:55:28,253 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-29 03:55:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:29,200 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-29 03:55:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:55:29,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-10-29 03:55:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:29,202 INFO L225 Difference]: With dead ends: 78 [2020-10-29 03:55:29,202 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:55:29,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 03:55:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:55:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-29 03:55:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 03:55:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-29 03:55:29,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2020-10-29 03:55:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:29,220 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-29 03:55:29,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:55:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-29 03:55:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:55:29,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:29,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:29,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:55:29,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash 795652578, now seen corresponding path program 8 times [2020-10-29 03:55:29,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:29,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724259720] [2020-10-29 03:55:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:29,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:29,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:34,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:55:34,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:55:34,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:55:34,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:34,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:34,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:55:34,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 03:55:34,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:55:34,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:34,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:34,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:34,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:34,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:34,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:34,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:34,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:34,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:34,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:34,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 03:55:34,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724259720] [2020-10-29 03:55:34,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:34,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:55:34,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934446290] [2020-10-29 03:55:34,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:55:34,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:55:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:55:34,406 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 12 states. [2020-10-29 03:55:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:34,838 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-29 03:55:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:55:34,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-29 03:55:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:34,840 INFO L225 Difference]: With dead ends: 132 [2020-10-29 03:55:34,840 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:55:34,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:55:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:55:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-29 03:55:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 03:55:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-29 03:55:34,861 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2020-10-29 03:55:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:34,861 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-29 03:55:34,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:55:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-29 03:55:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:55:34,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:34,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:34,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:55:34,865 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash -710442688, now seen corresponding path program 9 times [2020-10-29 03:55:34,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:34,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757453679] [2020-10-29 03:55:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:36,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:38,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:39,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:39,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 03:55:39,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:55:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:40,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:40,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:40,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:40,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:40,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:55:40,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:40,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:40,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:40,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:40,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:40,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:40,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:40,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:55:40,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757453679] [2020-10-29 03:55:40,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:40,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:55:40,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084639110] [2020-10-29 03:55:40,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:55:40,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:55:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:55:40,034 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 12 states. [2020-10-29 03:55:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:40,541 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-29 03:55:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:55:40,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-29 03:55:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:40,543 INFO L225 Difference]: With dead ends: 74 [2020-10-29 03:55:40,543 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:55:40,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:55:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:55:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 03:55:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:55:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-29 03:55:40,556 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2020-10-29 03:55:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:40,557 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-29 03:55:40,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:55:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-29 03:55:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 03:55:40,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:40,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:40,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:55:40,558 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 76988220, now seen corresponding path program 10 times [2020-10-29 03:55:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:40,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620255564] [2020-10-29 03:55:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:42,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:43,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:45,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:45,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:45,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 03:55:45,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:55:45,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 03:55:45,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:45,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 03:55:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:55:45,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:46,579 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-29 03:55:46,902 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 03:55:47,167 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-29 03:55:48,164 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-29 03:55:48,338 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-29 03:55:48,511 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-29 03:55:48,673 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-29 03:55:48,873 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-29 03:55:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:50,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:50,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:50,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:50,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:50,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:50,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620255564] [2020-10-29 03:55:50,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:50,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 03:55:50,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663483801] [2020-10-29 03:55:50,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 03:55:50,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:50,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 03:55:50,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 03:55:50,146 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 40 states. [2020-10-29 03:55:51,150 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-29 03:55:51,932 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2020-10-29 03:55:52,146 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-29 03:55:52,915 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 03:55:53,403 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-29 03:55:53,997 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-29 03:55:54,244 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-29 03:55:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:55,170 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-10-29 03:55:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 03:55:55,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-10-29 03:55:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:55,172 INFO L225 Difference]: With dead ends: 90 [2020-10-29 03:55:55,173 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:55:55,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=397, Invalid=3635, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 03:55:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:55:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-10-29 03:55:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 03:55:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-10-29 03:55:55,186 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 58 [2020-10-29 03:55:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:55,186 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-10-29 03:55:55,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 03:55:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-10-29 03:55:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 03:55:55,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:55,188 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:55,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:55:55,188 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2129195302, now seen corresponding path program 11 times [2020-10-29 03:55:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:55,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939595910] [2020-10-29 03:55:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:55,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:55,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:55,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:00,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:56:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:00,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:00,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:00,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:00,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:00,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:00,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:00,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:00,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:00,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:00,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:00,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-29 03:56:00,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939595910] [2020-10-29 03:56:00,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:00,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:56:00,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471791268] [2020-10-29 03:56:00,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:56:00,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:56:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:56:00,424 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 14 states. [2020-10-29 03:56:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:01,011 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2020-10-29 03:56:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:56:01,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-29 03:56:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:01,013 INFO L225 Difference]: With dead ends: 152 [2020-10-29 03:56:01,013 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 03:56:01,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:56:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 03:56:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-10-29 03:56:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:56:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-29 03:56:01,031 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 60 [2020-10-29 03:56:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:01,031 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-29 03:56:01,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:56:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-29 03:56:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 03:56:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:01,040 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:01,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:56:01,041 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -250417096, now seen corresponding path program 12 times [2020-10-29 03:56:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:01,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183091584] [2020-10-29 03:56:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:01,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:01,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:06,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:06,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:56:06,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:06,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:06,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:06,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:06,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:06,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:06,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:06,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:06,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:06,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:06,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:06,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:06,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:06,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-29 03:56:06,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183091584] [2020-10-29 03:56:06,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:06,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:56:06,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402982103] [2020-10-29 03:56:06,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:56:06,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:56:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:56:06,334 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 14 states. [2020-10-29 03:56:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:06,987 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-29 03:56:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:56:06,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-29 03:56:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:06,988 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:56:06,988 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:56:06,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:56:06,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:56:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 03:56:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 03:56:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-29 03:56:06,998 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 62 [2020-10-29 03:56:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:06,999 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-29 03:56:06,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:56:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-29 03:56:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 03:56:07,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:07,000 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:56:07,000 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash -774446540, now seen corresponding path program 13 times [2020-10-29 03:56:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449703267] [2020-10-29 03:56:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:07,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:12,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:56:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:13,074 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-29 03:56:13,497 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-29 03:56:17,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:17,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:17,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:17,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:17,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:17,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:17,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:17,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:17,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:17,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:17,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449703267] [2020-10-29 03:56:17,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:17,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 03:56:17,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609524515] [2020-10-29 03:56:17,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 03:56:17,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:17,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 03:56:17,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 03:56:17,694 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 46 states. [2020-10-29 03:56:19,132 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-29 03:56:21,679 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-29 03:56:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:23,050 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-29 03:56:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 03:56:23,050 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-29 03:56:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:23,052 INFO L225 Difference]: With dead ends: 102 [2020-10-29 03:56:23,052 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 03:56:23,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=468, Invalid=6012, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 03:56:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 03:56:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2020-10-29 03:56:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 03:56:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-29 03:56:23,066 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 66 [2020-10-29 03:56:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:23,066 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-29 03:56:23,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 03:56:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-29 03:56:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 03:56:23,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:23,067 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:23,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:56:23,068 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash -19246126, now seen corresponding path program 14 times [2020-10-29 03:56:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:23,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106060055] [2020-10-29 03:56:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:23,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:28,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:56:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:28,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:28,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:28,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:28,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:28,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:28,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:28,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:28,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:28,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:28,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:28,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:28,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:28,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-29 03:56:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106060055] [2020-10-29 03:56:28,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:28,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:56:28,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027311563] [2020-10-29 03:56:28,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:56:28,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:56:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:56:28,319 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 16 states. [2020-10-29 03:56:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:28,908 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2020-10-29 03:56:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:56:28,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-29 03:56:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:28,910 INFO L225 Difference]: With dead ends: 172 [2020-10-29 03:56:28,910 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 03:56:28,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:56:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 03:56:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2020-10-29 03:56:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 03:56:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-29 03:56:28,928 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 68 [2020-10-29 03:56:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:28,928 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-29 03:56:28,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:56:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-29 03:56:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 03:56:28,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:28,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:28,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:56:28,930 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:28,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2093565744, now seen corresponding path program 15 times [2020-10-29 03:56:28,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:28,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920156603] [2020-10-29 03:56:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:28,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:56:33,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:34,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:34,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:34,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:34,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:34,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:34,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:34,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:34,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:34,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:34,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:34,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:34,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:34,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:34,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:34,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:34,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-29 03:56:34,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920156603] [2020-10-29 03:56:34,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:34,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:56:34,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330360604] [2020-10-29 03:56:34,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:56:34,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:56:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:56:34,155 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 16 states. [2020-10-29 03:56:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:34,947 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-10-29 03:56:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:56:34,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-29 03:56:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:34,951 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:56:34,951 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:56:34,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:56:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:56:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-29 03:56:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:56:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-29 03:56:34,961 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2020-10-29 03:56:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:34,962 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-29 03:56:34,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:56:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-29 03:56:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 03:56:34,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:34,963 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:34,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:56:34,963 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash 238153004, now seen corresponding path program 16 times [2020-10-29 03:56:34,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:34,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189442314] [2020-10-29 03:56:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:36,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:40,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 03:56:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:40,632 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-29 03:56:40,917 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-29 03:56:41,046 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-29 03:56:41,212 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-29 03:56:41,409 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 03:56:41,626 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-29 03:56:41,799 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-29 03:56:42,025 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-29 03:56:42,189 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 03:56:42,410 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-29 03:56:42,572 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 03:56:42,792 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-29 03:56:42,986 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-29 03:56:43,183 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-29 03:56:43,526 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-29 03:56:43,874 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-29 03:56:44,214 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-10-29 03:56:44,457 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-29 03:56:44,712 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-29 03:56:44,973 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-29 03:56:45,292 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-10-29 03:56:45,618 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-10-29 03:56:45,999 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 46 [2020-10-29 03:56:46,339 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2020-10-29 03:56:46,696 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-29 03:56:47,044 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2020-10-29 03:56:47,363 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-29 03:56:47,599 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 03:56:47,900 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-29 03:56:48,153 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-29 03:56:48,434 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-29 03:56:48,690 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-29 03:56:48,961 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-29 03:56:49,215 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-29 03:56:49,457 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 03:56:49,962 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-29 03:56:51,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:51,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:51,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:51,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:51,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:51,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:51,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:51,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:51,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189442314] [2020-10-29 03:56:51,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:51,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-29 03:56:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472208085] [2020-10-29 03:56:51,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-29 03:56:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-29 03:56:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2901, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 03:56:51,161 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 57 states. [2020-10-29 03:56:52,288 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2020-10-29 03:56:52,714 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-29 03:56:53,197 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 74 [2020-10-29 03:56:53,746 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 87 [2020-10-29 03:56:54,233 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2020-10-29 03:56:54,822 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 91 [2020-10-29 03:56:55,317 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2020-10-29 03:56:55,865 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 81 [2020-10-29 03:56:56,350 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 72 [2020-10-29 03:56:56,868 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 82 [2020-10-29 03:56:57,860 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 94 [2020-10-29 03:56:58,332 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2020-10-29 03:56:58,682 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 73 [2020-10-29 03:56:59,297 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 85 [2020-10-29 03:56:59,729 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 86 [2020-10-29 03:57:00,730 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 95 [2020-10-29 03:57:01,271 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 76 [2020-10-29 03:57:01,700 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 91 [2020-10-29 03:57:02,061 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 71 [2020-10-29 03:57:02,622 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 86 [2020-10-29 03:57:03,063 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 80 [2020-10-29 03:57:03,489 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2020-10-29 03:57:04,083 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 77 [2020-10-29 03:57:04,453 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2020-10-29 03:57:04,886 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2020-10-29 03:57:05,513 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 92 [2020-10-29 03:57:06,107 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 86 [2020-10-29 03:57:06,573 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 84 [2020-10-29 03:57:07,176 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 80 [2020-10-29 03:57:07,518 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-29 03:57:08,027 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 85 [2020-10-29 03:57:08,789 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 110 [2020-10-29 03:57:09,195 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-29 03:57:09,667 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-10-29 03:57:09,953 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-29 03:57:10,328 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-10-29 03:57:10,832 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-29 03:57:11,682 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-29 03:57:12,191 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-29 03:57:12,760 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 03:57:13,591 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-29 03:57:14,022 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-29 03:57:14,370 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2020-10-29 03:57:14,751 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2020-10-29 03:57:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:15,608 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-29 03:57:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-29 03:57:15,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 74 [2020-10-29 03:57:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:15,611 INFO L225 Difference]: With dead ends: 125 [2020-10-29 03:57:15,611 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 03:57:15,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=1589, Invalid=11293, Unknown=0, NotChecked=0, Total=12882 [2020-10-29 03:57:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 03:57:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-29 03:57:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 03:57:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2020-10-29 03:57:15,629 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 74 [2020-10-29 03:57:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:15,629 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2020-10-29 03:57:15,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-29 03:57:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2020-10-29 03:57:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 03:57:15,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:15,630 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:15,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:57:15,630 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1868660534, now seen corresponding path program 17 times [2020-10-29 03:57:15,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:15,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344030423] [2020-10-29 03:57:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:15,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:57:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 03:57:20,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:57:20,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:20,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:20,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:20,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:20,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:20,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:57:20,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:20,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:20,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-29 03:57:20,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344030423] [2020-10-29 03:57:20,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:20,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:57:20,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321127918] [2020-10-29 03:57:20,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:57:20,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:20,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:57:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:57:20,922 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 18 states. [2020-10-29 03:57:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:21,734 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2020-10-29 03:57:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:57:21,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-29 03:57:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:21,736 INFO L225 Difference]: With dead ends: 192 [2020-10-29 03:57:21,737 INFO L226 Difference]: Without dead ends: 108 [2020-10-29 03:57:21,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:57:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-29 03:57:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-29 03:57:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 03:57:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-29 03:57:21,752 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 76 [2020-10-29 03:57:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:21,752 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-29 03:57:21,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:57:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-29 03:57:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 03:57:21,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:21,753 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:21,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:57:21,754 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1984788952, now seen corresponding path program 18 times [2020-10-29 03:57:21,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:21,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061218649] [2020-10-29 03:57:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:21,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:21,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:22,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:26,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:57:26,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:27,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:27,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:27,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:27,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:27,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:27,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:27,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:57:27,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:27,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-29 03:57:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061218649] [2020-10-29 03:57:27,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:27,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:57:27,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531710854] [2020-10-29 03:57:27,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:57:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:57:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:57:27,050 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 18 states. [2020-10-29 03:57:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:28,131 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-10-29 03:57:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:57:28,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-29 03:57:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:28,133 INFO L225 Difference]: With dead ends: 104 [2020-10-29 03:57:28,134 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:57:28,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:57:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:57:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-29 03:57:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 03:57:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-29 03:57:28,145 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2020-10-29 03:57:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:28,146 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-29 03:57:28,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:57:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-29 03:57:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 03:57:28,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:28,146 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:28,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:57:28,147 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2054168540, now seen corresponding path program 19 times [2020-10-29 03:57:28,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:28,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299726131] [2020-10-29 03:57:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:28,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:33,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 03:57:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:33,977 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-29 03:57:34,331 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-29 03:57:34,594 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-29 03:57:34,902 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-29 03:57:35,215 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-29 03:57:35,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-29 03:57:35,996 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-29 03:57:36,299 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-29 03:57:36,606 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-29 03:57:37,771 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-10-29 03:57:37,990 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-10-29 03:57:38,234 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-29 03:57:38,505 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-10-29 03:57:38,798 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2020-10-29 03:57:39,092 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2020-10-29 03:57:39,392 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-10-29 03:57:39,687 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-29 03:57:39,998 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-29 03:57:40,286 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-29 03:57:40,540 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-29 03:57:40,787 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-29 03:57:41,039 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-29 03:57:41,273 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-29 03:57:41,581 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-29 03:57:41,831 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-29 03:57:42,112 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-29 03:57:43,009 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-29 03:57:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:44,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:44,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:44,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:44,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:44,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:44,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:44,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:44,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:44,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:44,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299726131] [2020-10-29 03:57:44,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:44,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-29 03:57:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018074389] [2020-10-29 03:57:44,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-29 03:57:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-29 03:57:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=3758, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 03:57:44,887 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 65 states. [2020-10-29 03:57:47,171 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-29 03:57:47,687 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-29 03:57:48,289 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-29 03:57:49,013 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 115 [2020-10-29 03:57:50,667 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-29 03:57:51,062 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-29 03:57:51,307 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-29 03:57:51,527 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 03:57:51,751 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-29 03:57:52,949 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2020-10-29 03:57:53,185 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 03:57:53,517 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 03:57:54,070 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 03:57:54,637 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 03:57:55,214 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 03:57:55,484 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-29 03:57:55,892 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-29 03:57:56,182 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-29 03:57:56,581 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-29 03:57:56,877 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-29 03:57:57,415 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-29 03:57:58,073 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 81 [2020-10-29 03:57:58,381 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-29 03:57:58,926 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-29 03:57:59,433 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-29 03:57:59,767 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-29 03:58:00,042 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-29 03:58:00,308 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-29 03:58:00,553 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-29 03:58:00,792 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-29 03:58:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:01,459 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-10-29 03:58:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-29 03:58:01,460 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 82 [2020-10-29 03:58:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:01,462 INFO L225 Difference]: With dead ends: 133 [2020-10-29 03:58:01,462 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 03:58:01,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1413, Invalid=14087, Unknown=0, NotChecked=0, Total=15500 [2020-10-29 03:58:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 03:58:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2020-10-29 03:58:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 03:58:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2020-10-29 03:58:01,483 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 82 [2020-10-29 03:58:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:01,483 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2020-10-29 03:58:01,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-29 03:58:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2020-10-29 03:58:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 03:58:01,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:01,484 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:01,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:58:01,484 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1471441470, now seen corresponding path program 20 times [2020-10-29 03:58:01,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:01,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258977710] [2020-10-29 03:58:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:01,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:01,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:58:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:06,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:58:06,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:06,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:06,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:06,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:06,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:06,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:06,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:06,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:06,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:06,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:06,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:06,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:06,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:06,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-29 03:58:06,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258977710] [2020-10-29 03:58:06,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:06,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:58:06,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695381338] [2020-10-29 03:58:06,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:58:06,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:58:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:58:06,907 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 20 states. [2020-10-29 03:58:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:07,932 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2020-10-29 03:58:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:58:07,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2020-10-29 03:58:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:07,934 INFO L225 Difference]: With dead ends: 207 [2020-10-29 03:58:07,934 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 03:58:07,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:58:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 03:58:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2020-10-29 03:58:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 03:58:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-29 03:58:07,950 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 84 [2020-10-29 03:58:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:07,950 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-29 03:58:07,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:58:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-29 03:58:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 03:58:07,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:07,951 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:07,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:58:07,951 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash -222909152, now seen corresponding path program 21 times [2020-10-29 03:58:07,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:07,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465030990] [2020-10-29 03:58:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:08,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:12,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:58:12,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:13,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:13,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:13,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:13,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:13,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:13,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:13,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:13,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:13,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:13,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:13,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-29 03:58:13,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465030990] [2020-10-29 03:58:13,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:13,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:58:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871068454] [2020-10-29 03:58:13,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:58:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:58:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:58:13,331 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 20 states. [2020-10-29 03:58:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:14,681 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-10-29 03:58:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:58:14,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2020-10-29 03:58:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:14,686 INFO L225 Difference]: With dead ends: 114 [2020-10-29 03:58:14,686 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 03:58:14,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:58:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 03:58:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-29 03:58:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 03:58:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-29 03:58:14,700 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 86 [2020-10-29 03:58:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:14,700 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-29 03:58:14,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:58:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-29 03:58:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 03:58:14,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:14,701 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:14,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:58:14,701 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash 232307484, now seen corresponding path program 22 times [2020-10-29 03:58:14,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:14,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773614439] [2020-10-29 03:58:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-29 03:58:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 03:58:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:21,011 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-29 03:58:21,281 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-29 03:58:21,609 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-29 03:58:21,785 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-29 03:58:21,973 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-29 03:58:22,405 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-29 03:58:22,606 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 03:58:22,791 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51