/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=SHALLOWEST --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-crafted/mapavg4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:02:20,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:02:20,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:02:20,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:02:20,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:02:20,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:02:20,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:02:20,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:02:20,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:02:20,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:02:20,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:02:20,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:02:20,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:02:20,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:02:20,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:02:20,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:02:20,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:02:20,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:02:20,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:02:20,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:02:20,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:02:20,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:02:20,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:02:20,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:02:20,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:02:20,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:02:20,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:02:20,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:02:20,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:02:20,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:02:20,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:02:20,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:02:20,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:02:20,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:02:20,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:02:20,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:02:20,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:02:20,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:02:20,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:02:20,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:02:20,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:02:20,476 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 [2020-10-26 19:02:20,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:02:20,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:02:20,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:02:20,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:02:20,511 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:02:20,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:02:20,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:02:20,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:02:20,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:02:20,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:02:20,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:02:20,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:02:20,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:02:20,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:02:20,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:02:20,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:02:20,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:02:20,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:02:20,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:02:20,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:02:20,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:02:20,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:02:20,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:02:20,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:02:20,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:02:20,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:02:20,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:02:20,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:02:20,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:02:20,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:02:20,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:02:20,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:02:20,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:02:20,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:02:20,970 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:02:20,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg4.i [2020-10-26 19:02:21,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/447c30cd3/9f296c84b37f4576bebae53bcc4c9a26/FLAG8a8535788 [2020-10-26 19:02:21,741 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:02:21,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/mapavg4.i [2020-10-26 19:02:21,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/447c30cd3/9f296c84b37f4576bebae53bcc4c9a26/FLAG8a8535788 [2020-10-26 19:02:22,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/447c30cd3/9f296c84b37f4576bebae53bcc4c9a26 [2020-10-26 19:02:22,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:02:22,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:02:22,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:22,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:02:22,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:02:22,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725b18a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22, skipping insertion in model container [2020-10-26 19:02:22,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:02:22,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:02:22,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:22,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:02:22,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:22,420 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:02:22,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22 WrapperNode [2020-10-26 19:02:22,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:22,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:02:22,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:02:22,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:02:22,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:02:22,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:02:22,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:02:22,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:02:22,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (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 [2020-10-26 19:02:22,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:02:22,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:02:22,590 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:02:22,590 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2020-10-26 19:02:22,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:02:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:02:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:02:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:02:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:02:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:02:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:02:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:02:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2020-10-26 19:02:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:02:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:02:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:02:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:02:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:02:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:02:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:02:22,928 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:02:22,928 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:02:22,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:22 BoogieIcfgContainer [2020-10-26 19:02:22,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:02:22,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:02:22,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:02:22,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:02:22,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:02:22" (1/3) ... [2020-10-26 19:02:22,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589430b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:22, skipping insertion in model container [2020-10-26 19:02:22,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (2/3) ... [2020-10-26 19:02:22,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589430b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:22, skipping insertion in model container [2020-10-26 19:02:22,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:22" (3/3) ... [2020-10-26 19:02:22,941 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg4.i [2020-10-26 19:02:22,956 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:02:22,967 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:02:23,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:02:23,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:02:23,041 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:02:23,041 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:02:23,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:02:23,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:02:23,042 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:02:23,042 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:02:23,042 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:02:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:02:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:23,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:23,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:23,076 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:23,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1157692497, now seen corresponding path program 1 times [2020-10-26 19:02:23,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:23,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580973741] [2020-10-26 19:02:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:23,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:25,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:02:25,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2106 [2020-10-26 19:02:25,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:02:25,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:25,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:25,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:25,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:02:25,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:25,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:02:25,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:25,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:25,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:02:25,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:25,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:25,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:25,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580973741] [2020-10-26 19:02:25,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:25,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:02:25,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330169453] [2020-10-26 19:02:25,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:02:25,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:02:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:25,638 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 19:02:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:25,797 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 19:02:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:02:25,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 19:02:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:25,810 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:02:25,811 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:02:25,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:02:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:02:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:02:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:02:25,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 19:02:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:25,899 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:02:25,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:02:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:02:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:25,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:25,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:25,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:02:25,906 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1911757649, now seen corresponding path program 1 times [2020-10-26 19:02:25,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:25,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121740253] [2020-10-26 19:02:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:28,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:28,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:02:28,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2179 [2020-10-26 19:02:28,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:28,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:28,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:28,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:28,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:28,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:28,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:28,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:28,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:28,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:28,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:28,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:28,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:28,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:28,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:28,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:02:28,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:28,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:28,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:28,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:02:28,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:28,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:28,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:28,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:28,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:28,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:28,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:28,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:02:28,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:28,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:28,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121740253] [2020-10-26 19:02:28,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:28,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:02:28,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442272389] [2020-10-26 19:02:28,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:02:28,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:28,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:02:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:02:28,274 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:02:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:28,410 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 19:02:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:02:28,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:02:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:28,412 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:02:28,412 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:02:28,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:02:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:02:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:02:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:02:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:02:28,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 19:02:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:28,425 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:02:28,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:02:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:02:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:02:28,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:28,427 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:02:28,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:02:28,428 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:28,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2127198191, now seen corresponding path program 1 times [2020-10-26 19:02:28,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:28,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368630293] [2020-10-26 19:02:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:02:33,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:33,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:02:33,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:33,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:33,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:02:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:33,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:02:33,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:02:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:33,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:02:33,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:33,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:02:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:33,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 19:02:33,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:02:33,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368630293] [2020-10-26 19:02:33,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:33,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:02:33,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656593068] [2020-10-26 19:02:33,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:02:33,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:33,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:02:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:02:33,635 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 19:02:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:33,833 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 19:02:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:02:33,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:02:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:33,835 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:02:33,835 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:02:33,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:02:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:02:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:02:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:02:33,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 19:02:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:33,849 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:02:33,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:02:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:02:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:02:33,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:33,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:33,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:02:33,855 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash 869573329, now seen corresponding path program 2 times [2020-10-26 19:02:33,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:33,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623571758] [2020-10-26 19:02:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:02:38,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:38,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:02:38,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:38,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:38,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:38,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:38,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:38,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:02:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:39,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:39,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:39,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 19:02:39,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:39,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:39,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:39,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:39,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:02:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:39,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:39,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:39,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:39,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 19:02:39,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:39,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:39,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:39,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:02:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:39,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:39,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:39,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 19:02:39,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:39,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:39,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:02:39,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623571758] [2020-10-26 19:02:39,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:39,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:02:39,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407586011] [2020-10-26 19:02:39,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:02:39,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:02:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:39,173 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 19:02:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:39,435 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 19:02:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:02:39,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 19:02:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:39,437 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:02:39,437 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:02:39,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:02:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:02:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:02:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:02:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:02:39,454 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 19:02:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:39,454 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:02:39,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:02:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:02:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:02:39,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:39,457 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-10-26 19:02:39,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:02:39,457 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:39,458 INFO L82 PathProgramCache]: Analyzing trace with hash 525822865, now seen corresponding path program 3 times [2020-10-26 19:02:39,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:39,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057563737] [2020-10-26 19:02:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:39,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:02:44,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:02:44,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:44,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:44,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:44,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:44,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:44,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:02:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:44,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 19:02:44,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:02:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:44,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 19:02:44,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:02:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:44,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 19:02:44,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:02:44,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057563737] [2020-10-26 19:02:44,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:44,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:02:44,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427430551] [2020-10-26 19:02:44,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:02:44,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:44,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:02:44,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:02:44,846 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 19:02:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:45,153 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 19:02:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:02:45,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:02:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:45,155 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:02:45,155 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:02:45,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:02:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:02:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:02:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:02:45,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 19:02:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:45,173 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:02:45,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:02:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:02:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:02:45,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:45,177 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 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] [2020-10-26 19:02:45,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:02:45,178 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 677700177, now seen corresponding path program 4 times [2020-10-26 19:02:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:45,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518659843] [2020-10-26 19:02:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:02:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:02:50,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:50,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:50,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:02:50,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:50,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:02:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:50,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 19:02:50,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:02:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:50,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 19:02:50,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:02:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:50,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 19:02:50,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-26 19:02:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518659843] [2020-10-26 19:02:50,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:50,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:02:50,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953099905] [2020-10-26 19:02:50,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:02:50,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:02:50,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:02:50,577 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 19:02:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:50,904 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 19:02:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:02:50,905 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 19:02:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:50,907 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:02:50,907 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:02:50,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:02:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:02:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:02:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:02:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:02:50,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 19:02:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:50,921 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:02:50,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:02:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:02:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:02:50,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:50,924 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:50,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:02:50,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1925449489, now seen corresponding path program 5 times [2020-10-26 19:02:50,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:50,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150615149] [2020-10-26 19:02:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:51,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:55,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:02:55,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:02:55,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:55,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:56,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:56,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:56,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:56,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:56,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:56,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:02:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:56,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 19:02:56,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:56,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:56,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:02:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:56,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 19:02:56,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:56,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:56,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:02:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:56,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 19:02:56,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 75 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:02:56,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150615149] [2020-10-26 19:02:56,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:56,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:02:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203772536] [2020-10-26 19:02:56,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:02:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:56,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:02:56,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:56,387 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 19:02:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:56,729 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:02:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:02:56,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 19:02:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:56,730 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:02:56,730 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:02:56,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:02:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:02:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:02:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:02:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:02:56,739 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 19:02:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:02:56,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:02:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:02:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:02:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:56,741 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:56,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:02:56,742 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1364974033, now seen corresponding path program 6 times [2020-10-26 19:02:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092208437] [2020-10-26 19:02:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:03:01,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:01,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:03:01,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:01,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:01,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:01,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:01,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:01,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:01,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:01,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:03:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:03:01,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:01,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 19:03:01,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:01,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:03:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:03:02,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:02,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 19:03:02,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:02,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:03:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:03:02,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 19:03:02,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 108 proven. 252 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:03:02,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092208437] [2020-10-26 19:03:02,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:02,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:03:02,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366539048] [2020-10-26 19:03:02,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:03:02,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:03:02,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:03:02,296 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 19:03:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:02,666 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:03:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:03:02,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:03:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:02,668 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:03:02,668 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:03:02,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:03:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:03:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:03:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:03:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:03:02,677 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 19:03:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:02,677 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:03:02,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:03:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:03:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:03:02,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:02,678 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:02,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:03:02,679 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:02,679 INFO L82 PathProgramCache]: Analyzing trace with hash 909335185, now seen corresponding path program 7 times [2020-10-26 19:03:02,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:02,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018995442] [2020-10-26 19:03:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:07,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:03:07,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:03:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:07,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:07,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:07,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:07,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:07,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:07,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:07,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:07,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:03:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:07,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:07,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:03:07,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:07,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 19:03:07,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:07,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:03:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:03:08,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 19:03:08,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:08,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:03:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:03:08,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 19:03:08,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:08,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 147 proven. 343 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:03:08,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018995442] [2020-10-26 19:03:08,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:08,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:03:08,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259009843] [2020-10-26 19:03:08,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:03:08,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:08,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:03:08,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:03:08,336 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 19:03:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:08,795 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 19:03:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:03:08,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 19:03:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:08,797 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:03:08,797 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:03:08,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:03:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:03:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:03:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:03:08,817 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 19:03:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:08,817 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:03:08,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:03:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:03:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:03:08,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:08,822 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:08,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:03:08,823 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1569617583, now seen corresponding path program 8 times [2020-10-26 19:03:08,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:08,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120243895] [2020-10-26 19:03:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:13,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:13,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:03:13,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:13,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:03:13,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:13,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:13,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:13,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:13,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:13,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:13,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:13,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:13,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:13,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:13,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:13,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:13,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:03:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:14,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:03:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:14,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 19:03:14,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:03:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:14,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 192 proven. 448 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:03:14,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120243895] [2020-10-26 19:03:14,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:14,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:03:14,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809734618] [2020-10-26 19:03:14,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:03:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:14,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:03:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:03:14,398 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 19:03:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:14,964 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 19:03:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:03:14,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:03:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:14,965 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:03:14,965 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:03:14,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:03:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:03:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:03:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:03:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:03:14,975 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 19:03:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:14,975 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:03:14,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:03:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:03:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:03:14,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:14,977 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:14,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:03:14,977 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash 375219729, now seen corresponding path program 9 times [2020-10-26 19:03:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:14,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245715076] [2020-10-26 19:03:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:15,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:03:20,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:20,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:03:20,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:20,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:20,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:20,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:20,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:20,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:03:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:20,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:20,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 19:03:20,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:03:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:20,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:20,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 19:03:20,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:03:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:20,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:20,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 19:03:20,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 243 proven. 567 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 19:03:20,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245715076] [2020-10-26 19:03:20,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:20,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:03:20,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179184133] [2020-10-26 19:03:20,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:03:20,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:03:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:03:20,926 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 19:03:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:21,502 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:03:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:03:21,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 19:03:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:21,503 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:03:21,503 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:03:21,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:03:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:03:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:03:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:03:21,519 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 19:03:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:21,524 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:03:21,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:03:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:03:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:03:21,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:21,528 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:21,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:03:21,528 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 22933713, now seen corresponding path program 10 times [2020-10-26 19:03:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:21,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271616880] [2020-10-26 19:03:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:26,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:03:26,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:26,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:03:26,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:26,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:26,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:26,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:26,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:03:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:26,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:26,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:03:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:27,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:27,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 19:03:27,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:27,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:27,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:27,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:03:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:27,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 19:03:27,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 300 proven. 700 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:03:27,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271616880] [2020-10-26 19:03:27,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:27,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:03:27,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004195814] [2020-10-26 19:03:27,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:03:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:03:27,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:03:27,384 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 19:03:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:28,001 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 19:03:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:03:28,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 19:03:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:28,004 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:03:28,004 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:03:28,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:03:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:03:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:03:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:03:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:03:28,021 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 19:03:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:28,023 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:03:28,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:03:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:03:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:03:28,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:28,027 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:28,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:03:28,028 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1309005423, now seen corresponding path program 11 times [2020-10-26 19:03:28,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:28,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354347048] [2020-10-26 19:03:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:33,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:33,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:03:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:33,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:33,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 19:03:33,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:33,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:33,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:33,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:03:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:03:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:33,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:33,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 19:03:33,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:33,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 363 proven. 847 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:03:33,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354347048] [2020-10-26 19:03:33,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:33,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:03:33,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277722499] [2020-10-26 19:03:33,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:03:33,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:03:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:33,848 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 19:03:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:34,610 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 19:03:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:03:34,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 19:03:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:34,612 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:03:34,612 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:03:34,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:03:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:03:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:03:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:03:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:03:34,630 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 19:03:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:34,633 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:03:34,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:03:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:03:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:03:34,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:34,635 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:34,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:03:34,635 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1171853393, now seen corresponding path program 12 times [2020-10-26 19:03:34,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:34,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883744479] [2020-10-26 19:03:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:34,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:39,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:39,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:39,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:39,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:39,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:39,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:03:39,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:39,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:03:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:39,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:39,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:39,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:40,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:03:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:40,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:40,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:03:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:40,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 432 proven. 1008 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 19:03:40,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883744479] [2020-10-26 19:03:40,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:40,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:03:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893071836] [2020-10-26 19:03:40,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:03:40,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:03:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:03:40,527 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 19:03:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:41,370 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 19:03:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:03:41,371 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 19:03:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:41,372 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:03:41,373 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:03:41,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:03:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:03:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:03:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:03:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:03:41,382 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 19:03:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:41,382 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:03:41,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:03:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:03:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:03:41,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:41,384 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:41,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:03:41,384 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1715362543, now seen corresponding path program 13 times [2020-10-26 19:03:41,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:41,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262893964] [2020-10-26 19:03:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:46,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:03:46,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:03:46,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:46,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:46,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:46,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:46,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:46,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:03:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:46,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:47,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:03:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:47,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:47,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:47,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:03:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:47,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:47,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:47,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:47,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-26 19:03:47,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:47,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:47,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 507 proven. 1183 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 19:03:47,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262893964] [2020-10-26 19:03:47,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:47,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:03:47,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121797404] [2020-10-26 19:03:47,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:03:47,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:03:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:03:47,462 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 19:03:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:48,291 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:03:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:03:48,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 19:03:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:48,293 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:03:48,293 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:03:48,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:03:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:03:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:03:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:03:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:03:48,302 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 19:03:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:48,302 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:03:48,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:03:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:03:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:03:48,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:48,304 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:48,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:03:48,304 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 966453201, now seen corresponding path program 14 times [2020-10-26 19:03:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:48,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580069180] [2020-10-26 19:03:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:48,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:03:53,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:03:53,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:53,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:53,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:03:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:53,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 19:03:53,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:54,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:03:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:54,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:54,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:54,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:54,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:54,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-26 19:03:54,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:54,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:54,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:54,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:54,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:54,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:03:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:54,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:54,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 588 proven. 1372 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 19:03:54,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580069180] [2020-10-26 19:03:54,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:54,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:03:54,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157396370] [2020-10-26 19:03:54,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:03:54,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:03:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:54,464 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 19:03:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:55,398 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 19:03:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:03:55,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 19:03:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:55,400 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:03:55,400 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:03:55,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:03:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:03:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:03:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:03:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:03:55,409 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 19:03:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:55,409 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:03:55,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:03:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:03:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:03:55,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:55,411 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:55,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:03:55,411 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1349245073, now seen corresponding path program 15 times [2020-10-26 19:03:55,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:55,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076161573] [2020-10-26 19:03:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:04:00,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:04:00,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:00,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:00,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:00,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:00,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:00,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:04:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:00,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:01,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:04:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:01,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:01,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:04:01,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:01,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-26 19:04:01,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:01,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:01,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:04:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:01,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:01,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:04:01,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:01,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 19:04:01,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:01,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:01,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:01,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 675 proven. 1575 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:04:01,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076161573] [2020-10-26 19:04:01,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:01,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:04:01,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890903358] [2020-10-26 19:04:01,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:04:01,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:04:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:04:01,674 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:04:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:02,659 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:04:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:04:02,660 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:04:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:02,661 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:04:02,661 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:04:02,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:04:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:04:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:04:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:04:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:04:02,677 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:04:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:02,678 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:04:02,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:04:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:04:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:04:02,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:02,680 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:02,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:04:02,680 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1738836143, now seen corresponding path program 16 times [2020-10-26 19:04:02,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:02,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894855130] [2020-10-26 19:04:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:07,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:07,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:04:07,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:07,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 19:04:07,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:07,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:07,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:07,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:07,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:04:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:08,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:08,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:04:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:08,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:04:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:09,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:04:09,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-26 19:04:09,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 768 proven. 1792 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 19:04:09,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894855130] [2020-10-26 19:04:09,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:09,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:04:09,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124510668] [2020-10-26 19:04:09,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:04:09,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:04:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:04:09,129 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:04:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:10,123 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:04:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:04:10,124 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:04:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:10,126 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:04:10,126 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:04:10,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:04:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:04:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:04:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:04:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:04:10,134 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:04:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:10,134 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:04:10,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:04:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:04:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:04:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:10,136 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:10,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:04:10,136 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1253098513, now seen corresponding path program 17 times [2020-10-26 19:04:10,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:10,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695814335] [2020-10-26 19:04:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:10,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:15,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:04:15,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:15,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:04:15,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:15,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:15,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:15,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:15,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:15,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:15,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:04:15,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:04:15,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:04:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:15,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:15,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:15,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-26 19:04:15,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:15,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:04:16,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:04:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:16,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-26 19:04:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:04:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:16,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 867 proven. 2023 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:04:16,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695814335] [2020-10-26 19:04:16,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:16,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:04:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395986378] [2020-10-26 19:04:16,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:04:16,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:04:16,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:04:16,721 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:04:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:17,994 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:04:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:04:17,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:04:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:17,996 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:04:17,996 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:04:17,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:04:17,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:04:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:04:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:04:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:04:18,006 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:04:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:18,006 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:04:18,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:04:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:04:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:04:18,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:18,008 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:18,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:04:18,008 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 265469649, now seen corresponding path program 18 times [2020-10-26 19:04:18,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:18,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982251107] [2020-10-26 19:04:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:18,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:23,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:23,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:23,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:23,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:23,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:04:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:23,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:24,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:04:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:04:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:24,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:24,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:24,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-26 19:04:24,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 972 proven. 2268 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-26 19:04:24,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982251107] [2020-10-26 19:04:24,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:24,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:04:24,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126236682] [2020-10-26 19:04:24,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:04:24,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:04:24,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:04:24,884 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:04:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:26,209 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:04:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:04:26,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:04:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:26,211 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:04:26,211 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:04:26,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:04:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:04:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:04:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:04:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:04:26,223 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:04:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:26,224 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:04:26,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:04:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:04:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:04:26,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:26,230 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:26,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:04:26,230 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash -280467567, now seen corresponding path program 19 times [2020-10-26 19:04:26,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:26,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236555710] [2020-10-26 19:04:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:26,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:04:31,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:31,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 19:04:31,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:31,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:31,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:31,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:31,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:04:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:31,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:32,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:04:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:32,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:32,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:04:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:33,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:33,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:33,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:33,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-26 19:04:33,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:33,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:33,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:33,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:33,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 1083 proven. 2527 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-26 19:04:33,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236555710] [2020-10-26 19:04:33,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:33,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:04:33,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801909055] [2020-10-26 19:04:33,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:04:33,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:04:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:04:33,360 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:04:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:34,762 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:04:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:04:34,763 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:04:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:34,765 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:04:34,765 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:04:34,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:04:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:04:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:04:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:04:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:04:34,774 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:04:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:34,774 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:04:34,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:04:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:04:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:04:34,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:34,776 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:34,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:04:34,776 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1069071953, now seen corresponding path program 20 times [2020-10-26 19:04:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:34,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743095766] [2020-10-26 19:04:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:34,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:34,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:39,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:39,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:40,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:40,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:04:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:40,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:40,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:41,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:04:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:41,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:41,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-26 19:04:41,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:41,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:04:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:41,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4135 backedges. 1200 proven. 2800 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:04:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743095766] [2020-10-26 19:04:41,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:41,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:04:41,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792702108] [2020-10-26 19:04:41,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:04:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:04:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:04:41,832 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:04:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:43,372 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:04:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:04:43,373 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:04:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:43,374 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:04:43,374 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:04:43,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:04:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:04:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:04:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:04:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:04:43,394 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:04:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:43,394 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:04:43,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:04:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:04:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:04:43,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:43,396 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:43,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:04:43,396 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1762999535, now seen corresponding path program 21 times [2020-10-26 19:04:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:43,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149002610] [2020-10-26 19:04:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:43,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:43,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:43,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:48,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:48,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:48,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:48,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:48,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:48,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:48,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:04:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:49,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:49,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:49,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:04:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:49,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:49,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:50,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:50,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:04:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:50,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:50,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:50,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:50,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-26 19:04:50,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:50,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:50,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:50,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:50,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4551 backedges. 1323 proven. 3087 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:04:50,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149002610] [2020-10-26 19:04:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:04:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293497352] [2020-10-26 19:04:50,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:04:50,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:04:50,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:04:50,961 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:04:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:52,547 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:04:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:04:52,547 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:04:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:52,549 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:04:52,549 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:04:52,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:04:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:04:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:04:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:04:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:04:52,558 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:04:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:52,558 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:04:52,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:04:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:04:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:04:52,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:52,560 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:52,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:04:52,560 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1178241583, now seen corresponding path program 22 times [2020-10-26 19:04:52,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:52,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251874792] [2020-10-26 19:04:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:52,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:57,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:04:57,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:57,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:04:57,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:57,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:58,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:58,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:58,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:58,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:04:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:58,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:59,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:04:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:59,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:59,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:59,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:59,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-26 19:04:59,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:04:59,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:04:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:05:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:00,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:05:00,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 1452 proven. 3388 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:05:00,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251874792] [2020-10-26 19:05:00,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:00,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:05:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805801647] [2020-10-26 19:05:00,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:05:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:05:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:05:00,346 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:05:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:02,000 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:05:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:05:02,000 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:05:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:02,001 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:05:02,001 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:05:02,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:05:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:05:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:05:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:05:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:05:02,015 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:05:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:02,016 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:05:02,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:05:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:05:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:05:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:02,018 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:02,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:05:02,020 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:02,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1940924783, now seen corresponding path program 23 times [2020-10-26 19:05:02,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:02,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843292759] [2020-10-26 19:05:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:02,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:02,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:07,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:07,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:05:07,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:07,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:05:07,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:07,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:07,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:07,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:07,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:07,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:07,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:07,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:05:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:07,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:07,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:07,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:05:07,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:07,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-26 19:05:07,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:07,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:08,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:05:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:08,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:09,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:09,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:05:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:09,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:09,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:05:09,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:09,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-26 19:05:09,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:09,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5443 backedges. 1587 proven. 3703 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:05:09,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843292759] [2020-10-26 19:05:09,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:09,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:05:09,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578222781] [2020-10-26 19:05:09,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:05:09,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:09,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:05:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:05:09,716 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:05:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:11,605 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:05:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:05:11,605 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:05:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:11,607 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:05:11,607 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:05:11,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:05:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:05:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:05:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:05:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:05:11,616 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:05:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:11,616 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:05:11,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:05:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:05:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:05:11,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:11,618 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:11,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:05:11,618 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash 28370257, now seen corresponding path program 24 times [2020-10-26 19:05:11,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:11,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536757463] [2020-10-26 19:05:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:11,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:16,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:16,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:05:16,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:16,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:05:16,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:16,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:17,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:17,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:17,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:17,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:17,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:17,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:17,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:17,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:17,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:05:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:17,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:17,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:17,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-26 19:05:17,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:17,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:17,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:17,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:17,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:18,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:05:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:18,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:18,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:05:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:19,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:19,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:19,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:19,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-26 19:05:19,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:19,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:19,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:19,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:19,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5919 backedges. 1728 proven. 4032 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-26 19:05:19,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536757463] [2020-10-26 19:05:19,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:19,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:05:19,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148242283] [2020-10-26 19:05:19,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:05:19,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:05:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:05:19,510 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:05:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:21,337 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:05:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:05:21,338 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:05:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:21,339 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:05:21,339 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:05:21,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:05:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:05:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:05:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:05:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:05:21,356 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:05:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:21,356 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:05:21,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:05:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:05:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:05:21,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:21,358 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:21,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:05:21,359 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 204448273, now seen corresponding path program 25 times [2020-10-26 19:05:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:21,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917620786] [2020-10-26 19:05:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:21,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:21,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:26,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:26,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:26,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:26,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:05:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:27,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:27,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:27,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:28,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:05:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:28,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:28,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:28,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-26 19:05:28,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:28,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:28,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:05:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:29,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:29,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:29,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:29,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-26 19:05:29,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:29,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 1875 proven. 4375 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:05:29,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917620786] [2020-10-26 19:05:29,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:29,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:05:29,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473488346] [2020-10-26 19:05:29,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:05:29,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:05:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:05:29,176 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:05:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:31,212 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:05:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:05:31,213 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:05:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:31,214 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:05:31,215 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:05:31,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:05:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:05:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:05:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:05:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:05:31,224 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:05:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:31,224 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:05:31,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:05:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:05:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:05:31,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:31,226 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:31,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:05:31,226 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034223, now seen corresponding path program 26 times [2020-10-26 19:05:31,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:31,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255633150] [2020-10-26 19:05:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:31,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:36,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:05:36,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:36,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:05:36,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:36,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:36,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:36,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:36,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:36,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:36,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:05:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:37,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:38,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:05:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:38,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:38,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:38,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:38,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-26 19:05:38,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:05:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6931 backedges. 2028 proven. 4732 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-26 19:05:39,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255633150] [2020-10-26 19:05:39,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:39,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:05:39,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139603225] [2020-10-26 19:05:39,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:05:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:05:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:05:39,185 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states. [2020-10-26 19:05:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:41,381 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-26 19:05:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:05:41,382 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 242 [2020-10-26 19:05:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:41,384 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:05:41,384 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:05:41,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2020-10-26 19:05:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:05:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:05:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:05:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:05:41,393 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 242 [2020-10-26 19:05:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:41,393 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:05:41,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:05:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:05:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 19:05:41,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:41,395 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:41,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:05:41,395 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1161962897, now seen corresponding path program 27 times [2020-10-26 19:05:41,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:41,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789456162] [2020-10-26 19:05:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:41,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:41,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:41,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:46,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 19:05:46,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:46,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-26 19:05:46,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:47,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:47,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:47,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:05:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:47,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:47,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:47,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:05:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:48,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:49,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:49,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:49,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:49,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-26 19:05:49,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:49,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:49,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:49,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-26 19:05:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:49,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:49,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:49,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7467 backedges. 2187 proven. 5103 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:05:49,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789456162] [2020-10-26 19:05:49,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:49,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:05:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829951661] [2020-10-26 19:05:49,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:05:49,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:05:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:05:49,964 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-26 19:05:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:52,292 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-26 19:05:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:05:52,293 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 250 [2020-10-26 19:05:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:52,294 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:05:52,294 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:05:52,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 19:05:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:05:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:05:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:05:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:05:52,304 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 250 [2020-10-26 19:05:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:52,305 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:05:52,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:05:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:05:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:05:52,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:52,306 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:52,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:05:52,307 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1006375855, now seen corresponding path program 28 times [2020-10-26 19:05:52,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:52,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708921812] [2020-10-26 19:05:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5160 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:58,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:58,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:05:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:58,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:58,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-26 19:05:58,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:58,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:59,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-26 19:05:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:00,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:06:00,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:00,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-10-26 19:06:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:06:00,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:00,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-26 19:06:00,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:06:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:06:00,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8023 backedges. 2352 proven. 5488 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-26 19:06:00,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708921812] [2020-10-26 19:06:00,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:00,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:06:00,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523469462] [2020-10-26 19:06:00,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:06:00,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:06:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:06:00,957 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 61 states.