/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/bAnd1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 18:58:27,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 18:58:27,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 18:58:27,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 18:58:27,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 18:58:27,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 18:58:27,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 18:58:27,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 18:58:27,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 18:58:27,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 18:58:27,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 18:58:27,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 18:58:27,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 18:58:27,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 18:58:27,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 18:58:27,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 18:58:27,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 18:58:27,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 18:58:27,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 18:58:27,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 18:58:27,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 18:58:27,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 18:58:27,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 18:58:27,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 18:58:27,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 18:58:27,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 18:58:27,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 18:58:27,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 18:58:27,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 18:58:27,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 18:58:27,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 18:58:27,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 18:58:27,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 18:58:27,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 18:58:27,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 18:58:27,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 18:58:27,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 18:58:27,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 18:58:27,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 18:58:27,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 18:58:27,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 18:58:27,443 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 18:58:27,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 18:58:27,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 18:58:27,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 18:58:27,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 18:58:27,502 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 18:58:27,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 18:58:27,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 18:58:27,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 18:58:27,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 18:58:27,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 18:58:27,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 18:58:27,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 18:58:27,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 18:58:27,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 18:58:27,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 18:58:27,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 18:58:27,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 18:58:27,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 18:58:27,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 18:58:27,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 18:58:27,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 18:58:27,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 18:58:27,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 18:58:27,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 18:58:27,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 18:58:27,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 18:58:27,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 18:58:27,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 18:58:27,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 18:58:27,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 18:58:27,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 18:58:28,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 18:58:28,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 18:58:28,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 18:58:28,055 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 18:58:28,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd1.i [2020-10-26 18:58:28,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb36ad45c/e046630f3a444f2c828d8c65b8cdcda2/FLAG1935d3ae3 [2020-10-26 18:58:28,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 18:58:28,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/bAnd1.i [2020-10-26 18:58:28,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb36ad45c/e046630f3a444f2c828d8c65b8cdcda2/FLAG1935d3ae3 [2020-10-26 18:58:29,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb36ad45c/e046630f3a444f2c828d8c65b8cdcda2 [2020-10-26 18:58:29,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 18:58:29,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 18:58:29,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 18:58:29,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 18:58:29,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d962d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 18:58:29,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 18:58:29,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 18:58:29,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,568 INFO L208 MainTranslator]: Completed translation [2020-10-26 18:58:29,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29 WrapperNode [2020-10-26 18:58:29,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 18:58:29,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 18:58:29,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 18:58:29,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 18:58:29,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 18:58:29,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (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 18:58:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 18:58:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 18:58:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 18:58:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2020-10-26 18:58:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 18:58:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 18:58:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 18:58:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 18:58:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 18:58:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 18:58:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 18:58:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 18:58:30,300 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 18:58:30,301 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 18:58:30,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:30 BoogieIcfgContainer [2020-10-26 18:58:30,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 18:58:30,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 18:58:30,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 18:58:30,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 18:58:30,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 06:58:29" (1/3) ... [2020-10-26 18:58:30,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7133a4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:30, skipping insertion in model container [2020-10-26 18:58:30,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (2/3) ... [2020-10-26 18:58:30,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7133a4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:30, skipping insertion in model container [2020-10-26 18:58:30,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:30" (3/3) ... [2020-10-26 18:58:30,318 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2020-10-26 18:58:30,332 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 18:58:30,338 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 18:58:30,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 18:58:30,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 18:58:30,401 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 18:58:30,401 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 18:58:30,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 18:58:30,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 18:58:30,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 18:58:30,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 18:58:30,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 18:58:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 18:58:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 18:58:30,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:30,433 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 18:58:30,433 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash 585288593, now seen corresponding path program 1 times [2020-10-26 18:58:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:30,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227569973] [2020-10-26 18:58:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:30,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 18:58:31,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:31,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-26 18:58:31,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 18:58:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:31,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 18:58:31,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:31,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 18:58:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 18:58:31,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:31,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 18:58:31,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 18:58:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:31,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 18:58:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 18:58:31,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 18:58:31,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 18:58:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 18:58:31,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 18:58:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 18:58:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 18:58:31,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 18:58:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:31,581 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 18:58:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227569973] [2020-10-26 18:58:31,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 18:58:31,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502239631] [2020-10-26 18:58:31,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 18:58:31,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 18:58:31,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 18:58:31,624 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 18:58:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,766 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 18:58:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 18:58:31,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 18:58:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,776 INFO L225 Difference]: With dead ends: 60 [2020-10-26 18:58:31,777 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 18:58:31,780 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 18:58:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 18:58:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 18:58:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 18:58:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 18:58:31,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 18:58:31,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,829 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 18:58:31,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 18:58:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 18:58:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 18:58:31,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,832 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 18:58:31,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 18:58:31,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1339353745, now seen corresponding path program 1 times [2020-10-26 18:58:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248702844] [2020-10-26 18:58:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 18:58:33,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:33,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-26 18:58:33,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:33,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:33,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:33,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:33,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:33,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:33,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:33,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:33,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 18:58:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 18:58:33,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 18:58:33,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 18:58:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 18:58:33,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:33,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 18:58:33,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 18:58:33,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 18:58:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 18:58:33,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:33,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 18:58:33,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:33,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:33,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:33,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,379 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 18:58:33,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248702844] [2020-10-26 18:58:33,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:33,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 18:58:33,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602086736] [2020-10-26 18:58:33,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:33,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:33,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:33,387 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 18:58:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:33,575 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 18:58:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 18:58:33,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 18:58:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:33,576 INFO L225 Difference]: With dead ends: 52 [2020-10-26 18:58:33,576 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 18:58:33,578 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 18:58:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 18:58:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 18:58:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 18:58:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 18:58:33,588 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 18:58:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:33,589 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 18:58:33,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 18:58:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 18:58:33,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:33,591 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 18:58:33,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 18:58:33,592 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1648388849, now seen corresponding path program 1 times [2020-10-26 18:58:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:33,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020188778] [2020-10-26 18:58:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 18:58:38,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:38,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4476 [2020-10-26 18:58:38,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:38,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:38,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 18:58:38,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 18:58:38,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:38,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:38,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:38,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:38,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:38,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 18:58:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 18:58:38,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 18:58:38,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 18:58:38,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:38,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 18:58:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 18:58:38,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:38,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 18:58:38,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:38,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:38,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 18:58:38,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:38,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 18:58:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 18:58:38,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:38,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 18:58:38,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 18:58:38,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 18:58:38,338 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 18:58:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020188778] [2020-10-26 18:58:38,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:38,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271459958] [2020-10-26 18:58:38,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:38,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:38,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:38,344 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 18:58:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:38,589 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 18:58:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:38,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 18:58:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:38,590 INFO L225 Difference]: With dead ends: 57 [2020-10-26 18:58:38,591 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 18:58:38,592 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 18:58:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 18:58:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 18:58:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 18:58:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 18:58:38,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 18:58:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:38,610 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 18:58:38,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 18:58:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 18:58:38,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:38,615 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 18:58:38,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 18:58:38,615 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 60514641, now seen corresponding path program 2 times [2020-10-26 18:58:38,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:38,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798411987] [2020-10-26 18:58:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:43,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 18:58:43,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:43,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 18:58:43,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:43,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:43,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:43,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:43,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:43,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:43,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:43,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:43,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:58:43,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:43,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:43,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 18:58:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:43,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:43,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 18:58:43,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 18:58:43,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:43,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 18:58:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:43,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 18:58:43,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 18:58:43,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 18:58:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:43,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 18:58:43,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 18:58:43,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:43,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:43,894 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 18:58:43,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798411987] [2020-10-26 18:58:43,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:43,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:58:43,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604847639] [2020-10-26 18:58:43,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:58:43,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:43,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:58:43,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:43,899 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 18:58:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:44,164 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 18:58:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:58:44,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 18:58:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:44,165 INFO L225 Difference]: With dead ends: 63 [2020-10-26 18:58:44,166 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 18:58:44,167 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 18:58:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 18:58:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 18:58:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 18:58:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 18:58:44,176 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 18:58:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:44,176 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 18:58:44,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:58:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 18:58:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 18:58:44,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:44,177 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 18:58:44,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 18:58:44,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2107559345, now seen corresponding path program 3 times [2020-10-26 18:58:44,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:44,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64495707] [2020-10-26 18:58:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:44,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 18:58:49,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:49,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 18:58:49,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:49,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:49,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:49,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:49,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:49,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:58:49,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:49,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 18:58:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 18:58:49,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:49,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 18:58:49,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:49,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 18:58:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 18:58:49,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:49,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 18:58:49,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:49,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:49,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:49,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 18:58:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 18:58:49,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 18:58:49,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,468 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 18:58:49,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64495707] [2020-10-26 18:58:49,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:49,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 18:58:49,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733730707] [2020-10-26 18:58:49,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 18:58:49,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:49,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 18:58:49,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:58:49,473 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 18:58:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:49,786 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 18:58:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 18:58:49,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 18:58:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:49,788 INFO L225 Difference]: With dead ends: 69 [2020-10-26 18:58:49,789 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 18:58:49,791 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 18:58:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 18:58:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 18:58:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 18:58:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 18:58:49,810 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 18:58:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:49,811 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 18:58:49,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 18:58:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 18:58:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 18:58:49,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:49,815 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 18:58:49,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 18:58:49,815 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash -844910575, now seen corresponding path program 4 times [2020-10-26 18:58:49,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:49,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375989809] [2020-10-26 18:58:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:54,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:54,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 18:58:54,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:54,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 18:58:54,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:54,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:54,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 18:58:54,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:54,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:54,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:54,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:54,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:54,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:54,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 18:58:54,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:54,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:54,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:54,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:54,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 18:58:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:54,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 18:58:55,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:55,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 18:58:55,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:55,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:55,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 18:58:55,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 18:58:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 18:58:55,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:55,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 18:58:55,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 18:58:55,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 18:58:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:55,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 18:58:55,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:55,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 18:58:55,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:55,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:58:55,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 18:58:55,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,230 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 18:58:55,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375989809] [2020-10-26 18:58:55,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:55,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 18:58:55,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455864586] [2020-10-26 18:58:55,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 18:58:55,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 18:58:55,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:58:55,233 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 18:58:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:55,556 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 18:58:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:58:55,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 18:58:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:55,558 INFO L225 Difference]: With dead ends: 75 [2020-10-26 18:58:55,558 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 18:58:55,559 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 18:58:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 18:58:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 18:58:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 18:58:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 18:58:55,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 18:58:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:55,567 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 18:58:55,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 18:58:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 18:58:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 18:58:55,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:55,569 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 18:58:55,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 18:58:55,569 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1264383887, now seen corresponding path program 5 times [2020-10-26 18:58:55,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:55,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789515561] [2020-10-26 18:58:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:55,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:00,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 18:59:00,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:59:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 18:59:00,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:59:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 18:59:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:00,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:00,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:00,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:00,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:00,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:00,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:00,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 18:59:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:00,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:00,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 18:59:00,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:00,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 18:59:00,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:00,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:59:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 18:59:00,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:00,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 18:59:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:00,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 18:59:00,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:00,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 18:59:00,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:00,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:59:00,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:00,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 18:59:00,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:00,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 18:59:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:00,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:00,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 18:59:00,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:00,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 18:59:00,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:00,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:59:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 18:59:00,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:00,917 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 18:59:00,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789515561] [2020-10-26 18:59:00,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:00,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 18:59:00,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138336000] [2020-10-26 18:59:00,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 18:59:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 18:59:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 18:59:00,920 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 18:59:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:01,303 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 18:59:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 18:59:01,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 18:59:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:01,305 INFO L225 Difference]: With dead ends: 81 [2020-10-26 18:59:01,305 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 18:59:01,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:59:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 18:59:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 18:59:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 18:59:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 18:59:01,320 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 18:59:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:01,320 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 18:59:01,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 18:59:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 18:59:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 18:59:01,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:01,325 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 18:59:01,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 18:59:01,325 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash -952772911, now seen corresponding path program 6 times [2020-10-26 18:59:01,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:01,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59675673] [2020-10-26 18:59:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:06,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 18:59:06,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 18:59:06,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:59:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:59:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:06,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:06,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:06,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:06,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:06,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:06,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 18:59:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:06,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:06,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 18:59:06,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:06,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 18:59:06,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:06,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:59:06,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:06,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:59:06,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:06,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 18:59:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:06,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:59:06,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:06,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 18:59:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:06,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:06,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 18:59:06,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:06,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 18:59:06,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:06,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:59:06,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:06,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:59:06,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:06,693 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 18:59:06,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59675673] [2020-10-26 18:59:06,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:06,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 18:59:06,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819235227] [2020-10-26 18:59:06,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 18:59:06,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:06,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 18:59:06,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:59:06,703 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 18:59:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:07,254 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 18:59:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 18:59:07,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 18:59:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:07,256 INFO L225 Difference]: With dead ends: 87 [2020-10-26 18:59:07,256 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 18:59:07,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 18:59:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 18:59:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 18:59:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 18:59:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 18:59:07,266 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 18:59:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:07,266 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 18:59:07,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 18:59:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 18:59:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 18:59:07,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:07,268 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 18:59:07,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 18:59:07,269 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2106923825, now seen corresponding path program 7 times [2020-10-26 18:59:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:07,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379955750] [2020-10-26 18:59:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:07,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:07,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 18:59:12,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:12,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 18:59:12,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:59:12,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:12,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:12,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:12,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:12,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 18:59:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 18:59:12,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 18:59:12,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:59:12,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 18:59:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 18:59:12,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:12,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 18:59:12,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:59:12,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 18:59:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 18:59:12,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:12,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 18:59:12,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:12,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:12,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:59:12,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,777 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 18:59:12,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379955750] [2020-10-26 18:59:12,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:12,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 18:59:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095582512] [2020-10-26 18:59:12,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 18:59:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 18:59:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:59:12,787 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 18:59:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:13,316 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 18:59:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 18:59:13,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 18:59:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:13,318 INFO L225 Difference]: With dead ends: 93 [2020-10-26 18:59:13,318 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 18:59:13,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 18:59:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 18:59:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 18:59:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 18:59:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 18:59:13,339 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 18:59:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:13,339 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 18:59:13,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 18:59:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 18:59:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 18:59:13,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:13,345 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 18:59:13,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 18:59:13,345 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1134155153, now seen corresponding path program 8 times [2020-10-26 18:59:13,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:13,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591263287] [2020-10-26 18:59:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:13,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:13,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:13,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 18:59:18,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:18,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 18:59:18,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:18,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:18,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 18:59:18,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:18,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:18,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:18,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:18,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 18:59:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 18:59:18,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:18,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 18:59:18,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 18:59:18,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 18:59:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 18:59:18,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:18,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 18:59:18,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:18,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:18,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 18:59:18,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 18:59:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 18:59:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,843 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 18:59:18,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591263287] [2020-10-26 18:59:18,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:18,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 18:59:18,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71425297] [2020-10-26 18:59:18,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 18:59:18,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:18,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 18:59:18,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:59:18,846 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 18:59:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:19,477 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 18:59:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 18:59:19,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 18:59:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:19,478 INFO L225 Difference]: With dead ends: 99 [2020-10-26 18:59:19,479 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 18:59:19,480 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 18:59:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 18:59:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 18:59:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 18:59:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 18:59:19,490 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 18:59:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:19,490 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 18:59:19,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 18:59:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 18:59:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 18:59:19,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:19,492 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 18:59:19,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 18:59:19,492 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2000878095, now seen corresponding path program 9 times [2020-10-26 18:59:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:19,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831496783] [2020-10-26 18:59:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:19,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:59:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:24,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:24,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:24,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:24,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:24,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:24,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 18:59:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:24,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:24,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 18:59:24,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:24,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 18:59:24,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:59:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:24,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 18:59:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:24,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 18:59:24,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:24,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 18:59:24,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:24,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:24,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:24,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:59:24,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:25,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 18:59:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:25,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 18:59:25,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:25,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 18:59:25,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:59:25,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:25,073 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 18:59:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831496783] [2020-10-26 18:59:25,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:25,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 18:59:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822495901] [2020-10-26 18:59:25,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 18:59:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 18:59:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:25,076 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 18:59:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:25,807 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 18:59:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 18:59:25,807 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 18:59:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:25,809 INFO L225 Difference]: With dead ends: 105 [2020-10-26 18:59:25,809 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 18:59:25,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 18:59:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 18:59:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 18:59:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 18:59:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 18:59:25,820 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 18:59:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:25,820 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 18:59:25,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 18:59:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 18:59:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 18:59:25,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:25,822 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 18:59:25,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 18:59:25,823 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:25,823 INFO L82 PathProgramCache]: Analyzing trace with hash -803754927, now seen corresponding path program 10 times [2020-10-26 18:59:25,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:25,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478016830] [2020-10-26 18:59:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:25,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:30,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:30,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:59:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:30,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:30,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:30,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:30,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 18:59:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:31,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 18:59:31,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 18:59:31,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:59:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:31,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 18:59:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:31,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:31,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 18:59:31,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 18:59:31,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:59:31,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 18:59:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:31,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 18:59:31,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:31,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 18:59:31,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:59:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:31,623 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 18:59:31,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478016830] [2020-10-26 18:59:31,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:31,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 18:59:31,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173542606] [2020-10-26 18:59:31,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 18:59:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 18:59:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 18:59:31,628 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 18:59:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:32,314 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 18:59:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 18:59:32,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 18:59:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:32,316 INFO L225 Difference]: With dead ends: 111 [2020-10-26 18:59:32,317 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 18:59:32,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 18:59:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 18:59:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 18:59:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 18:59:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 18:59:32,327 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 18:59:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:32,328 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 18:59:32,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 18:59:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 18:59:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 18:59:32,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:32,329 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 18:59:32,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 18:59:32,330 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1067267919, now seen corresponding path program 11 times [2020-10-26 18:59:32,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:32,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709000822] [2020-10-26 18:59:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:32,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:32,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:32,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:37,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 18:59:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:37,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:37,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:37,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:37,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:37,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 18:59:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:37,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 18:59:37,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 18:59:37,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:37,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 18:59:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 18:59:37,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:37,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 18:59:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:37,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 18:59:37,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:37,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 18:59:37,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 18:59:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 18:59:37,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:37,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 18:59:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:38,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 18:59:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:38,059 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 18:59:38,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709000822] [2020-10-26 18:59:38,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:38,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 18:59:38,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375675749] [2020-10-26 18:59:38,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 18:59:38,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 18:59:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 18:59:38,063 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 18:59:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:38,893 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 18:59:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 18:59:38,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 18:59:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:38,896 INFO L225 Difference]: With dead ends: 117 [2020-10-26 18:59:38,896 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 18:59:38,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 18:59:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 18:59:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 18:59:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 18:59:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 18:59:38,915 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 18:59:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:38,916 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 18:59:38,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 18:59:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 18:59:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 18:59:38,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:38,922 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 18:59:38,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 18:59:38,922 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash 871848721, now seen corresponding path program 12 times [2020-10-26 18:59:38,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:38,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593069247] [2020-10-26 18:59:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:38,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:39,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:59:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:44,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:44,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:44,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:44,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:44,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:44,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:44,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 18:59:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:59:44,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:44,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 18:59:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:44,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:44,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 18:59:44,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:44,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 18:59:44,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 18:59:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:59:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 18:59:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:44,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 18:59:44,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:44,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 18:59:44,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:44,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 18:59:44,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:44,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:59:44,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:44,668 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 18:59:44,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593069247] [2020-10-26 18:59:44,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:44,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 18:59:44,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614456825] [2020-10-26 18:59:44,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 18:59:44,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 18:59:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 18:59:44,671 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 18:59:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:45,677 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 18:59:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 18:59:45,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 18:59:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:45,678 INFO L225 Difference]: With dead ends: 123 [2020-10-26 18:59:45,679 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 18:59:45,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 18:59:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 18:59:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 18:59:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 18:59:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 18:59:45,687 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 18:59:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:45,687 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 18:59:45,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 18:59:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 18:59:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 18:59:45,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:45,688 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 18:59:45,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 18:59:45,689 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1221485425, now seen corresponding path program 13 times [2020-10-26 18:59:45,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:45,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123181577] [2020-10-26 18:59:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:50,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 18:59:50,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:50,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 18:59:50,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:59:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 18:59:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:50,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:50,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:50,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:59:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 18:59:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:51,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 18:59:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:51,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 18:59:51,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:51,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 18:59:51,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:51,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:59:51,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:51,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 18:59:51,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:51,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 18:59:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:51,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 18:59:51,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:51,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 18:59:51,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:51,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:59:51,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:51,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 18:59:51,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:51,471 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 18:59:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123181577] [2020-10-26 18:59:51,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:51,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 18:59:51,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322878394] [2020-10-26 18:59:51,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 18:59:51,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:51,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 18:59:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 18:59:51,473 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 18:59:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:52,499 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 18:59:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 18:59:52,499 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 18:59:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:52,500 INFO L225 Difference]: With dead ends: 129 [2020-10-26 18:59:52,500 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 18:59:52,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 18:59:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 18:59:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 18:59:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 18:59:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 18:59:52,513 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 18:59:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:52,513 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 18:59:52,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 18:59:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 18:59:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 18:59:52,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:52,515 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 18:59:52,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 18:59:52,515 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1887494609, now seen corresponding path program 14 times [2020-10-26 18:59:52,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:52,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234407013] [2020-10-26 18:59:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:57,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 18:59:57,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:57,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:57,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 18:59:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:57,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:57,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:57,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 18:59:57,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:57,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 18:59:57,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:59:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 18:59:57,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 18:59:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 18:59:58,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 18:59:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 18:59:58,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 18:59:58,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:59:58,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 18:59:58,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 18:59:58,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,429 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 18:59:58,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234407013] [2020-10-26 18:59:58,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:58,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 18:59:58,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023770419] [2020-10-26 18:59:58,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 18:59:58,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 18:59:58,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 18:59:58,432 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 18:59:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:59,582 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 18:59:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 18:59:59,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 18:59:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:59,585 INFO L225 Difference]: With dead ends: 135 [2020-10-26 18:59:59,586 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 18:59:59,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 18:59:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 18:59:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 18:59:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 18:59:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 18:59:59,598 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 18:59:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:59,600 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 18:59:59,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 18:59:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 18:59:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 18:59:59,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:59,604 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 18:59:59,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 18:59:59,604 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2142775759, now seen corresponding path program 15 times [2020-10-26 18:59:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758319669] [2020-10-26 18:59:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:59,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:00:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:04,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:04,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:04,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:00:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:00:05,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:05,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:00:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:05,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:00:05,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:05,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 19:00:05,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:00:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:00:05,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:00:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:00:05,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:05,797 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 19:00:05,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758319669] [2020-10-26 19:00:05,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:05,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:00:05,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741332275] [2020-10-26 19:00:05,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:00:05,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:00:05,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:00:05,803 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:00:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:07,069 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:00:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:00:07,070 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:00:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:07,071 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:00:07,071 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:00:07,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:00:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:00:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:00:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:00:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:00:07,088 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:00:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:07,091 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:00:07,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:00:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:00:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:00:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:07,093 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 19:00:07,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:00:07,093 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1057210223, now seen corresponding path program 16 times [2020-10-26 19:00:07,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:07,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138362792] [2020-10-26 19:00:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:12,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:00:12,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:00:12,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:00:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:00:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:12,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:12,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:00:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:12,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:00:12,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:12,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 19:00:12,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:00:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:00:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:13,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:00:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:13,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:13,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:00:13,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:13,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:00:13,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:13,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:00:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:13,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:13,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:00:13,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 19:00:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:00:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:00:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:13,290 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 19:00:13,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138362792] [2020-10-26 19:00:13,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:13,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:00:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658674749] [2020-10-26 19:00:13,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:00:13,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:13,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:00:13,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:00:13,292 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:00:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:14,433 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:00:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:00:14,434 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:00:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:14,435 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:00:14,435 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:00:14,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:00:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:00:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:00:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:00:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:00:14,450 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:00:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:14,451 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:00:14,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:00:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:00:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:00:14,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:14,453 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 19:00:14,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:00:14,453 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:14,454 INFO L82 PathProgramCache]: Analyzing trace with hash -15261455, now seen corresponding path program 17 times [2020-10-26 19:00:14,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:14,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285748818] [2020-10-26 19:00:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:14,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:14,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:00:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:19,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:19,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:19,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:19,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:19,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:00:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:00:19,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:00:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:00:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:00:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:00:20,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,644 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 19:00:20,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285748818] [2020-10-26 19:00:20,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:20,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:00:20,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892247144] [2020-10-26 19:00:20,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:00:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:00:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:00:20,647 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:00:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:22,089 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:00:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:00:22,090 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:00:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:22,091 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:00:22,091 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:00:22,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:00:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:00:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:00:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:00:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:00:22,101 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:00:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:22,101 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:00:22,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:00:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:00:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:00:22,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:22,108 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 19:00:22,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:00:22,108 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1699645615, now seen corresponding path program 18 times [2020-10-26 19:00:22,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:22,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702832615] [2020-10-26 19:00:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:27,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:00:27,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:27,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:00:27,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:00:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:00:27,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:27,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:27,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:27,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:00:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:00:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:00:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:00:28,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:00:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:00:28,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:28,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 19:00:28,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:00:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:00:28,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,350 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 19:00:28,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702832615] [2020-10-26 19:00:28,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:28,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:00:28,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249184074] [2020-10-26 19:00:28,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:00:28,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:28,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:00:28,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:00:28,353 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:00:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:29,915 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:00:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:00:29,916 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:00:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:29,917 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:00:29,917 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:00:29,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:00:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:00:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:00:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:00:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:00:29,925 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:00:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:29,926 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:00:29,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:00:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:00:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:00:29,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:29,927 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 19:00:29,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:00:29,928 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1752939599, now seen corresponding path program 19 times [2020-10-26 19:00:29,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:29,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214481961] [2020-10-26 19:00:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:30,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:00:34,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:00:34,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:00:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:35,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:35,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:35,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:35,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:35,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:35,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:35,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:35,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:00:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:35,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:35,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:00:35,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:36,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:00:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:36,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:36,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:00:36,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:36,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:00:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:36,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:36,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:00:36,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-26 19:00:36,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:00:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:36,552 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 19:00:36,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214481961] [2020-10-26 19:00:36,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:36,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:00:36,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080290677] [2020-10-26 19:00:36,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:00:36,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:00:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:00:36,556 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:00:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:38,101 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:00:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:00:38,102 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:00:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:38,103 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:00:38,104 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:00:38,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:00:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:00:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:00:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:00:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:00:38,113 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:00:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:38,113 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:00:38,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:00:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:00:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:00:38,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:38,115 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 19:00:38,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:00:38,115 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1394047471, now seen corresponding path program 20 times [2020-10-26 19:00:38,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:38,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779347079] [2020-10-26 19:00:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:38,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:38,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:43,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:43,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:00:43,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:00:43,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:00:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:00:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:43,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:43,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:43,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:43,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:43,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:43,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:43,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:43,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:00:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:43,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:00:43,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:44,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:00:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:00:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:44,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:00:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:44,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:44,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:44,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:00:44,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:44,685 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 19:00:44,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779347079] [2020-10-26 19:00:44,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:44,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:00:44,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906999537] [2020-10-26 19:00:44,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:00:44,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:00:44,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:00:44,687 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:00:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:46,476 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:00:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:00:46,480 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:00:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:46,481 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:00:46,481 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:00:46,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:00:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:00:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:00:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:00:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:00:46,496 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:00:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:46,496 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:00:46,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:00:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:00:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:00:46,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:46,498 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 19:00:46,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:00:46,498 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1440169585, now seen corresponding path program 21 times [2020-10-26 19:00:46,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:46,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367581521] [2020-10-26 19:00:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:00:51,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:51,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:51,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:51,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:00:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:00:52,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:00:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:52,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:00:53,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:00:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:53,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:53,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:53,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:00:53,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:53,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-26 19:00:53,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:00:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:00:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:00:53,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:53,340 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 19:00:53,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367581521] [2020-10-26 19:00:53,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:53,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:00:53,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883098390] [2020-10-26 19:00:53,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:00:53,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:00:53,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:00:53,344 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:00:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:55,205 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:00:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:00:55,212 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:00:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:55,213 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:00:55,214 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:00:55,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:00:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:00:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:00:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:00:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:00:55,223 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:00:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:55,224 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:00:55,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:00:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:00:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:00:55,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:55,225 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 19:00:55,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:00:55,225 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:55,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:55,226 INFO L82 PathProgramCache]: Analyzing trace with hash -521573167, now seen corresponding path program 22 times [2020-10-26 19:00:55,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:55,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178131800] [2020-10-26 19:00:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:55,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:00,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:01:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:00,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:00,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:00,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:00,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:00,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:00,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:00,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:00,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:01:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:00,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:01,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:01,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:01:01,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:01,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 19:01:01,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:01,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:01:01,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:01,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:01:01,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:01,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:01:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:01,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:01:02,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:01:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:01:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,367 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 19:01:02,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178131800] [2020-10-26 19:01:02,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:02,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:01:02,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954184490] [2020-10-26 19:01:02,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:01:02,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:02,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:01:02,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:01:02,370 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:01:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:04,283 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:01:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:01:04,283 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:01:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:04,285 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:01:04,285 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:01:04,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:01:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:01:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:01:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:01:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:01:04,294 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:01:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:04,294 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:01:04,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:01:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:01:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:01:04,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:04,296 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 19:01:04,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:01:04,296 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2141712079, now seen corresponding path program 23 times [2020-10-26 19:01:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:04,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576243981] [2020-10-26 19:01:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:04,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:04,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:01:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:01:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:09,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:09,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:09,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:09,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:09,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:01:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:01:10,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 19:01:10,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:01:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:01:10,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:01:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:11,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:11,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:01:11,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 19:01:11,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:01:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:01:11,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:11,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:01:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:11,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:01:11,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:11,256 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 19:01:11,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576243981] [2020-10-26 19:01:11,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:11,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:01:11,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199649519] [2020-10-26 19:01:11,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:01:11,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:01:11,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:01:11,259 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:01:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:13,507 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:01:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:01:13,508 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:01:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:13,510 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:01:13,510 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:01:13,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:01:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:01:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:01:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:01:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:01:13,519 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:01:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:13,520 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:01:13,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:01:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:01:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:01:13,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:13,521 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 19:01:13,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:01:13,522 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1509698449, now seen corresponding path program 24 times [2020-10-26 19:01:13,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:13,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556475722] [2020-10-26 19:01:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:13,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:18,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:18,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:01:18,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:18,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:01:18,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:18,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:01:18,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:18,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:01:18,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:19,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:01:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:01:19,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:01:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:20,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:01:20,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:01:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:01:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:20,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:01:20,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,792 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 19:01:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556475722] [2020-10-26 19:01:20,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:20,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:01:20,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468330805] [2020-10-26 19:01:20,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:01:20,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:01:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:01:20,795 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:01:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:22,977 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:01:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:01:22,977 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:01:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:22,979 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:01:22,979 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:01:22,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:01:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:01:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:01:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:01:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:01:22,988 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:01:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:22,989 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:01:22,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:01:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:01:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:01:22,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:22,990 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 19:01:22,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:01:22,991 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:22,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1756447759, now seen corresponding path program 25 times [2020-10-26 19:01:22,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:22,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393427703] [2020-10-26 19:01:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:23,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:23,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:01:28,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:28,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:28,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:28,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:28,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:28,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:28,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:28,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:01:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:28,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:01:28,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:29,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:01:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:29,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:01:29,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:29,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:01:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:01:30,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:30,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 19:01:30,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:01:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:01:30,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,128 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 19:01:30,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393427703] [2020-10-26 19:01:30,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:30,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:01:30,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365889335] [2020-10-26 19:01:30,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:01:30,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:30,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:01:30,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:01:30,131 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:01:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:32,688 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:01:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:01:32,689 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:01:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:32,690 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:01:32,690 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:01:32,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:01:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:01:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:01:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:01:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:01:32,700 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:01:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:32,700 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:01:32,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:01:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:01:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:01:32,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:32,703 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 19:01:32,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:01:32,703 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1969799761, now seen corresponding path program 26 times [2020-10-26 19:01:32,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:32,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812312897] [2020-10-26 19:01:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:32,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:32,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:01:37,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:37,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:01:37,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:01:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:01:37,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:01:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:01:38,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:01:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:39,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:01:39,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:39,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 19:01:39,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:39,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:01:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:01:39,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:01:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:40,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:01:40,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:40,104 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 19:01:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812312897] [2020-10-26 19:01:40,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:40,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:01:40,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419443343] [2020-10-26 19:01:40,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:01:40,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:01:40,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:01:40,106 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states. [2020-10-26 19:01:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:42,776 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-26 19:01:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:01:42,776 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 242 [2020-10-26 19:01:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:42,778 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:01:42,778 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:01:42,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2020-10-26 19:01:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:01:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:01:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:01:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:01:42,789 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 242 [2020-10-26 19:01:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:42,789 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:01:42,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:01:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:01:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 19:01:42,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:42,791 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 19:01:42,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:01:42,792 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1426276017, now seen corresponding path program 27 times [2020-10-26 19:01:42,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943075821] [2020-10-26 19:01:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:42,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:01:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:48,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:48,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:48,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:01:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:48,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:48,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:48,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:01:48,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:49,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:01:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:01:50,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:50,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 19:01:50,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:01:50,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-26 19:01:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:01:50,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:50,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 19:01:50,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:01:50,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,337 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 19:01:50,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943075821] [2020-10-26 19:01:50,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:50,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:01:50,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616986469] [2020-10-26 19:01:50,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:01:50,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:01:50,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:01:50,339 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-26 19:01:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:53,248 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-26 19:01:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:01:53,249 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 250 [2020-10-26 19:01:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:53,250 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:01:53,250 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:01:53,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 19:01:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:01:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:01:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:01:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:01:53,262 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 250 [2020-10-26 19:01:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:53,262 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:01:53,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:01:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:01:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:01:53,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:53,264 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 19:01:53,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:01:53,264 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -898158319, now seen corresponding path program 28 times [2020-10-26 19:01:53,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:53,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402432489] [2020-10-26 19:01:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:58,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:58,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 19:01:58,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:01:58,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:01:58,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:01:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:01:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:01:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:01:59,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:00,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-26 19:02:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:00,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:00,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:02:00,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:00,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-26 19:02:00,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:00,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:02:00,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:00,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:02:00,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:00,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-10-26 19:02:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:00,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:02:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:00,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:02:00,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:01,017 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 19:02:01,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402432489] [2020-10-26 19:02:01,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:01,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:02:01,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136960279] [2020-10-26 19:02:01,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:02:01,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:02:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:02:01,019 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 61 states. [2020-10-26 19:02:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:03,893 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2020-10-26 19:02:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:02:03,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 258 [2020-10-26 19:02:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:03,895 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:02:03,895 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:02:03,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2020-10-26 19:02:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:02:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-26 19:02:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:02:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-26 19:02:03,904 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 258 [2020-10-26 19:02:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:03,904 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-26 19:02:03,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-26 19:02:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-26 19:02:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 19:02:03,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:03,906 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 29, 29, 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 19:02:03,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:02:03,906 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1380083343, now seen corresponding path program 29 times [2020-10-26 19:02:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:03,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956942469] [2020-10-26 19:02:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:03,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:02:08,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:09,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:09,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:02:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:02:09,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:09,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-26 19:02:09,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:02:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:02:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:11,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 19:02:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:11,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:11,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:11,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:02:11,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:11,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-26 19:02:11,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:02:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:02:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:11,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 19:02:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:11,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:11,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:02:11,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 19:02:11,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:11,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:02:11,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:11,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:02:11,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8599 backedges. 2523 proven. 5887 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-26 19:02:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956942469] [2020-10-26 19:02:11,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:11,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:02:11,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991046913] [2020-10-26 19:02:11,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:02:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:11,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:02:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:02:11,984 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 63 states.